A deleterious recessive allele is one that can be harmful when it is found in its homgous condition, resulting in a poorly fit phenotype. An example of this is the allelefor sickle cell, which results in the condition known as sickle cell anemia when both recessive alleles are inherited. owever, in regions of Afriche proportion of the sickle cell allele is igher than expected, with as much as 15% of the alleles in the population being the recessive, deleteriou rsion. In the African population, there is also a high prevalence of malaria, a disease caused by the parasitic infestation of a plasmodium protozoan in the blood of humans. The recessive allele for sickle cell has been maintained over many generations. Evaluate the graph above and select the claim that supports the high frequency of the recessive allele in these African populations.
A)There is a selective advantage to the aa genotype, as the presence of sickle cell provides a greater fitness in an environment where malaria is common.
B)There is a selective pressure against the aa genotype, but the presence of malaria induces new mutations which generates more alleles within the population.
C)There is directional selection towards the Aa genotype, since aa is often a lethal condition. Non-random mating tends to maintain the recessive allele in the population.
D)There is a selective advantage to the heterozygous (Aa) condition as there is selective pressure against both the AA and aa genotypes. This maintains the recessive allele in the population.
Answers
Answer:
D) There is a selective advantage to the heterozygous (Aa) condition as there is selective pressure against both the AA and aa genotypes. This maintains the recessive allele in the population.
Explanation:
Since the AA condition is more likely to be affected by malaria and the aa condition is more likely to not survive the sickle cell condition, the heterozygote here has the advantage.
The high frequency should be considered the D) There is a selective advantage to the heterozygous (Aa) condition.
Evaluation of the graph;Since the AA condition should be impacted by the malaria and the aa condition should not able to survive the cell condition i.e. sickle.
At the same time, the heterozygote has the advantage.
Also, there is the selective pressure that oppose to the AA and aa genetypes.
Hence, the option d is correct.
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Related Questions
What is the Linnaean system of classification? Why do scientists classify animals?
Answers
Answer:
-Linnaean Classification System: Classification of the Human Species.
-Biological scientists have worked to classify earth's organisms in a manner that would help us understand how both the present and the extinct species relate to each other.
[OSS.01] The picture below shows the most widely accepted model of the solar system.
Earth
Sun
2010 FLVS
Which of these statements best describes a function of this model?
K
Answers
The function of this model is option A: that is it helps us to understand the details of scientific concept.
What are the 7 solar systems?There are known to be 7 planets and they all are known to revolve round the Sun, they are:
Mercury Venus Earth Mars Jupiter SaturnUranusNeptune.Note that Scientific models are tools that are often used to explain and tell the behavior of real objects or systems and also they functions or they are used in a a lot of scientific disciplines, such as physics and chemistry, etc.
Therefore, The function of this model is option A: that is it helps us to understand the details of scientific concept.
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Which of the following is true about the Chromatids?
(a) It is a haploid chromosome
(b) It is a complete chromosome
(c) It is a duplicate chromosome
(d) It is one-half of the replicated chromosome
Answers
Answer:
(b) It is a complete chromosome
Hey y’all a gal needs help
Answers
Answer:
energy-rich molecule: ATP
use: it is hydrolyzed by cells to produce energy. Under standard conditions the removal of a phosphate group from ATP to produce ADP + Pi yields 30.6KJmol‐¹.
organelle: mitochondria
what are the different types of enzymes, their importance and specific functions in the human body
Answers
Proteases, Lipases and Amylases are the different types of enzyme in the human body.
What are the different types of enzymes?There are three main types of digestive enzymes in the human body such as Proteases, Lipases and Amylases.
Proteases is a type of enzyme that break down protein into small peptides and amino acids.
Lipases is an enzyme that break down fat into fatty acids plus a glycerol molecule.
Amylases is an enzyme that break down carbohydrates like starch into simple sugars.
So we can conclude that Proteases, Lipases and Amylases are the different types of enzyme in the human body.
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What would the genotype of the parents need to be to produce a child that has a 50% chance of being born homozygous recessive and a 50% of being born heterozygous for Huntington’s disease? An empty Punnett square is provided to show your work
Answers
One of the parents must be heterozygous while the other must be homzygous.
Huntington diseaseHuntington's disease is an autosomal dominant disease. In other words, only one allele (dominant) is required for the disease to manifest.
In order to produce a child with a 50% chance of being homzygous for the disease, one of the parents must be heterozygous for the disease, while the other must be homzygous.
Assuming the allele for the disease is A(a).
AA x Aa
AA Aa AA Aa
Probability of AA = 2/4 or 50%
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a) New plant does not grow from a seed kept in a closed box or bottle.
Answers
Answer:
simple there is no oxygen
NAD+ is a limiting factor in glycolysis. In the absence of ____________________ the conversion of (1) ____________________ to NAD+ via the ______________________________ is prevented from happening. In eukaryotes, the hydrogen atoms of the molecules mentioned in (1) are transferred to certain organic molecules in one of two methods: (2) ___________________________________ as can occur in yeast and ___________________________________ as can occur in human cells. In the process mentioned in (2), the hydrogen atoms are passed to ____________________, which is then converted to a molecule of ethanol. During this a molecule of ____________________ is oxidized to a molecule of ____________________, which allows glycolysis to continue on.
Answers
The correct options to fill in the gaps are:
ADP; NADH, and electron transport chainalcohol fermentation; lactic acid fermentation; acetaldehyde; NADH; and NAD+What is the role of NAD+ in glycolysis?NAD+ serves as an electron acceptor in glycolysis. It accepts two electrons to become reduced to NADH + H+.
NAD+ is a limiting factor in glycolysis. In the absence of ADP, the conversion of NADH to NAD+ via the electron transport chain is prevented from happening.
In eukaryotes, the hydrogen atoms of the molecules mentioned in are transferred to certain organic molecules in one of two methods: alcohol fermentation as can occur in yeast and lactic acid fermentation as can occur in human cells. In the process mentioned in, the hydrogen atoms are passed to acetaldehyde, which is then converted to a molecule of ethanol. During this a molecule of NADH is oxidized to a molecule of NAD+, which allows glycolysis to continue on.
In conclusion, NAD+ concentration is limiting to glycolysis.
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Do non-human primates have culture? Why or why not
Answers
Answer:
While nonhuman primates don't have obvious cultural traditions the same way humans do, such as variation in their clothing or adding extra spice to their food, primatologists have nonetheless identified behavioral practices that vary between communities and which are transmitted through social learning
Explanation:
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Occurs when the individual inherits only one (female) X chromosome
Answers
Answer:
Turner Syndrome
Explanation:
When someone only inherits only the X chromosome, their karyotype symbol for that will be XO. Symptoms of Turner Syndrome include "short height, failure of the ovaries to develop and heart defects."
HELP MEH PLEASE thank you yall
Answers
In the image, the structure indicated is the plant cell wall, which is responsible for protection and homeostasis.
What is the function of the plant cell wall?Cell wall is a cell structure that differentiates animal cells. Its main purpose is to avoid the plasma membrane of cells, skin function and resistance to physical resistance and which includes the plasma membrane of cells.
With this information, we can conclude that The cell wall is a very resistant structure composed of microfibrils of the polysaccharide called cellulose. It surrounds the plasma membrane and has pores in its structure that function as filters in relation to the external environment.
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which organism is responsible for returning nutrients back to the soil
Answers
According to the research, decomposers are organisms responsible for returning nutrients back to the soil.
What are decomposers?They are different organisms such as bacteria and fungi whose main function is to break down the waste of plants and animals.
With the decomposition process where organic matter is processed into inorganic, simple elements (nutrients) reappear in the soil that are used as food by plants.
Therefore, we can conclude that according to the research, decomposers are organisms responsible for returning nutrients back to the soil.
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The data in the graph are the result of a paramecium being placed in a hypertonic salt solution.
A graph entitled Paramecium Contractile Vacuole Contractions has salt concentration on the horizontal axis and contractions per minute on the vertical axis. A very low salt concentration has 30 contractions per minute, low: 22, medium: 15, high: 8, very-high: 2.
Based on the data in the graph, which would most likely happen if the paramecium were placed in distilled water?
The contractions would increase.
The contractions would decrease.
The contractions would cease altogether.
The contractions would establish dynamic equilibrium.
Answers
The contraction will increase. The first option is the correct option.
What is the contractile vacuole?It is an organ that helps to excrete excess water from the body of some protozoans such as paramecium.
The more excess water present in the organism, the more the contractile vacuole contracts to get rid of the water.
With distilled water, more water will enter the cell and this excess water will need to be gotten rid of. Thus, the contraction rate will increase.
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Answer:
A
Explanation:
PLS HELP ME WILL GIVE 100 PONITS:Explain how to compare 3 and 7 by writing the correct number or symbol in the blanks. 4 12
3 4 8 12 7 9 1
< > = 12 12 2
First, I would rewrite 3 as an equivalent fraction with a denominator of _____. 4
The equivalent fraction is ____. Then, I would compare the equivalent fraction to 7 . 12
So,
3 7
4 1
SUBJECT: science
Answers
Some examples of equivalent fractions include:
3/6 and 2/4 are both equivalents because they are equal to 1/225/50 and 50/100 are both equivalents because they are equal to 1/2, etcWhat is an Equivalent Fraction?This refers to the type of fractions that has different denominators and numerators but have the same value when broken down to the smallest terms.
Furthermore, some more examples of equivalent fractions are:
40/80 and 60/120 are both equivalents because they are equal to 1/2100/200 and 150/300 are both equivalents because they are equal to 1/2You should also note that equivalent fractions can be found by multiplying the numerator and the denominator by the same number and you would see if your fraction is an equivalent fraction or not.
Please note that your question is unclear, so I gave you a general overview to help you get a better understanding of the concept of equivalent fractions.
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A particular ant species has four pairs of chromosomes. Identify genetic possibilities from independent assortment of a gamete
Answers
There are "256" different genetic combinations that a gamete may make by independent assortment.
What is meant by independent assortment?
Homologous chromosomes are allocated at random to daughter cells during meiosis, while distinct chromosomes segregate apart from one another. The term for this is independent assortment. It produces gametes with distinctive chromosomal arrangements.
Calculation:
Here, the number of chromosomal pairs in the ant = 4.
Every pair of chromosomes is going to be divided into a single gamete during the gametogenesis process.
Therefore, there are 4 unpaired chromosomes in all.
Now that the gametes lack paired chromosomes, they are haploid.
Now, a gamete would only contain one of the single chromosome pairs.
Let's assume that the chromosomal gene in the cell is heterozygous.
There are thus going to be options = 2.
Therefore, their likelihood will provide possibilities =2 x 2= 4.
Then there would be 4⁴ chromosomes = 256 chromosomes.
Therefore it is concluded that the genetic possibilities from the independent assortment of a gamete are "256".
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Based on your knowledge of flowers, why do you think most flowers are bright in color?
Answers
Most flowers are bright in color because it is attractive to pollinators.
What is adaptation?An adaptation is any phenotypic trait that confers an evolutionary advantage to an individual.
Most flowers are bright in color because it is attractive to pollinators, which is required to transport pollen to other flowers and thus increase the genetic variation in the plant population.
In conclusion, flowers are bright in color to attract pollinators.
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Why are biogeochemical cycles important to
organisms?
A. Nutrients change forms as not every organism may use the
same form of a nutrient.
B. Energy is constantly recycled from space to sustain life on
Earth.
C. Energy is constantly being created to serve living organisms.
Answers
Answer:
importance of biogeochemical cycles through the ecosystem the cycle move the essitinal elements for life to sustain they are vitil as the recycle Store them to regulate the vital elements through the physical facets
Non-steroidal hormones can be produced by all of the following except the
pancreas
pituitary gland
hypothalamus
adrenal cortex
Answers
Answer: its b i just got done with it
Explanation:
You are reviewing a skeleton with severe trauma to the left clavicle, left scapula, and left humerus. The skull is severely fragmented as well. You notice the clavicle is separated cleanly in half mid-diaphysis. Nearby, the anterior portion the scapula has a dramatic cleft that is straight margined on its left (lateral) margin and shows jagged fracture and wastage of bone on its right (medial) margin. It progresses a full inch and a half or more downward posteriorly. The Humerus has a deep lateral transverse incision with slight chipping, deeper in the posterior aspect than the anterior. The skull is highly fragmented and bears fractures radiating from straight margin sites of trauma. The causative wounds are medium in width (3.5 mm) but very long (one runs from the most superior aspect of the right parietal, through the entirety of the left parietal at a diagonal and exits the anterior/inferior left parietal with fragmentation/wastage there and a nearby notch on the superior left zygomatic. There are three blows to this side of the skull (left), the one described is clearly the largest. Its radiating fractures end in those of the others or in bone sutures of the vault creating large triangular or irregular fragments. These blows show some wastage, biased toward the anterior aspect of each, with no evidence of crushed margins, but instead coarse striations. Which two types of trauma are indicated? What does the nature of the wounds indicate might be a likely implement? What does the order of trauma indicate about the positioning of the perpetrator and victim in this context?
Answers
The type of trauma that are indicated are both complex and chronic traumas.
What is trauma?Trauma can be defined as the serious event that can negatively affect the emotional, physical and mental being of an individual.
From the excerpt given, the two types of trauma represented are:
Chronic trauma: This is the type of trauma that is severe or very serious. Example is the fragmented skull and separation of the clavicle neatly in half mid-diaphysis.Complex trauma: This occurs when there is exposure to numerous events that causes trauma.The nature of the wound indicates that the cause would be of direct force from blows.
The positioning of the perpetrator and the victim according to the order of the trauma is that both of them where involved in a fight.
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If you observed that the Sun did not set during an entire 24-hour period of time during the summer months of June, July, and August, where are you most likely located?
South Pole
a location in the mid-latitudes
North Pole
near the Equator
Answers
The correct option is (c). We are supposed to be located in the north pole. This is due to Arctic circle phenomenon.
What is Arctic circle phenomenon?
Arctic circle phenomenon means that the sun does not set above this latitude during the summer months. Arctic circle is an imaginary line. North pole of the Arctic circle faces the periods of constant sunshine mainly during the summer months of june, july and august. This occurs due to the fact that Earth is tilted at its axis by 23 degress and during its rotation in summer months it's North pole gets aligned towards our star. For example, northmost parts of Norway.
That's why the Sun did not set during an entire 24 hour period of time during summer months of june,july and august.
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In order to facilitate reproduction, independent of cell division, both of chloroplasts and mitochondria have _________________________ and _________________________.
Answers
Answer:
In order to facilitate reproduction, independent of cell division, both of chloroplasts and mitochondria have DNA and ribosomes.
Help me please !!!!!!!!!!!!!
Answers
Answer:
cervix
Explanation:
Who sets the guidelines for water protection?
residents
local agencies
you
EPA
Answers
Answer:EPA
Under SDWA, EPA sets standards for drinking water quality and oversees the states, localities, and water suppliers who implement those standards.
Explanation:
Hypothesis: If cells are viewed under higher magnification, then more cell organelles will be seen.
Answers
The hypothesis is false. Higher magnifications only increase the details of organelles, not increase the number.
Microscope's MagnificationAt lower magnifications, cells on slides are brought into focus and the organelles are seen but not in detail.
At higher magnifications, the organelles of cells appear bigger and can be studied in more detail compared to at lower magnifications.
Thus, higher magnifications do not increase the number of organelles that will be seen, but their details.
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Dr. Gonzelez's psychiatric patient reports that last week she stayed up for three days writing because she felt incredibly energetic and creative. She reported to her therapy session looking tired and had not showered or changed clothes for several days. What disorder most fits the patient's symptoms?
A specific phobia
Major depressive disorder
Bipolar disorder
Generalized anxiety disorder
Answers
Answer:
The best treatment for specific phobias is a form of psychotherapy called exposure therapy. Sometimes your doctor may also recommend other therapies or medication. Understanding the cause of a phobia is actually less important than focusing on how to treat the avoidance behavior that has developed over time
Explanation:
The disorder that most fits the patient's symptoms is a bipolar disorder. The correct option is C.
What is bipolar disorder?Bipolar people have episodes of severe depression as well as episodes of mania, which include overwhelming joy, excitement, or happiness, enormous energy, a reduced need for sleep, and reduced inhibitions. Bipolar disorder is a highly individual experience.
The symptoms of bipolar disorder are frequently triggered by a stressful circumstance or situation. A relationship breakdown is an example of a stressful trigger. Abuse can be physical, intimate, or emotional.
Bipolar disorder is characterized by extreme mood swings that are unpredictable and frequently disrupt daily functioning.
According to Dr. Gonzelez's psychiatric patient, she stayed up for three days last week writing because she felt incredibly energetic and creative.
She arrived at her therapy session exhausted, having not showered or changed clothes in several days; the disorder that best fits the patient's symptoms is a bipolar disorder.
Thus, the correct option is C.
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What feature of a phylogenetic tree shows a group of organisms that evolved from a common ancestor?
Host
Branch
Tree
Clade
Answers
Answer: Clade
Explanation:
Question no.02: Why spermopsida termed as successful group of land plant.
Answers
Answer:
because they are vascular plants.
Explanation:
I looked it up
Which of the following is an ethical question?
A. How do we clone humans?
B. Will cloning technology be useful?
C. Do clones have the same rights as humans?
D. Can we clone humans?
Answers
Identify the structures in the cell pictured on the right.
Label A
Label B
Label C
Label D
Answers
Label A - Nucleus
Label B - Cytoplasm
Label C - Ribosome
Label D - DNA
Organelles of a cell
The picture is that of an animal cell.
The parts labeled A, B, C, and D respectively are the nucleus, the cytoplasm, the ribosome, and the cell's DNA.
The nucleus is located centrally and controls the activities of the cell. It is a double membrane organelle that house the genome of the cell. Materials are able to move in and out of the nucleus while the nuclear membrane act as a selectively permeable membrane.
The cytoplasm represents the inner content of the cell. It consists of the inner organelles and the liquid content, otherwise known as the cytosol.
The ribosome is a small spherical organelle that functions in the synthesis of proteins. Some ribosomes lie freely within the cytoplasm while others are found attached to another organelle known as the endoplasmic reticulum.
The DNA is located inside the nucleus. It is the molecule responsible for the transfer of traits from parents to offspring.
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Name the labeled structure
Answers
Answer is superior vena cava
Reason
See attached diagram