Answer:
The correct answer is - In F2 generation we should get a 3:1 ratio of phenotypes. 3 curly dominant, 1 wild type recessive.
Explanation:
In the given case, the cross between pure-bred wild-type flies with pure-bred mutant (curly-winged) flies and it is found that in F1 generation all offsprings are curly wings which means curly wings are dominant over wild-type.
let assume w gene is responsible for wild type and W gene is responsible for the curly wings which is dominant over wild type
W W
w Ww Ww
w Ww Ww
now on self crossing
W w
W Ww Ww
w Ww ww
In f2 generation there are 75% chances of the curly wing and 25% chances of wild type or the ratio of phenotype would be 3:1
what is HIV in full
Answer:
Human Immunodeficiency viruses
HIV Overview
HIV (human immunodeficiency virus) is a virus that attacks the body’s immune system. If HIV is not treated, it can lead to AIDS (acquired immunodeficiency syndrome).
There is currently no effective cure. Once people get HIV, they have it for life.
But with proper medical care, HIV can be controlled. People with HIV who get effective HIV treatment can live long, healthy lives and protect their partners.
History of HIV
HIV infection in humans came from a type of chimpanzee in Central Africa.
The chimpanzee version of the virus (called simian immunodeficiency virus, or SIV) was probably passed to humans when humans hunted these chimpanzees for meat and came in contact with their infected blood.
Studies show that HIV may have jumped from chimpanzees to humans as far back as the late 1800s.
Over decades, HIV slowly spread across Africa and later into other parts of the world. We know that the virus has existed in the United States since at least the mid to late 1970s.
To learn more about the history of HIV in the United States and CDC’s response to the epidemic, see CDC’s HIV and AIDS Timeline.
How do I know if I have HIV?
The only way to know for sure whether you have HIV is to get tested. Knowing your HIV status helps you make healthy decisions to prevent getting or transmitting HIV.
Are there symptoms?
Graphic listing symptoms of HIV: Fever,HIV Symptoms and Testing, Chills, Rash, Night sweats, Muscle aches, Sore throat, Fatigue, Swollen lymph nodes, and Mouth ulcers.
Some people have flu-like symptoms within 2 to 4 weeks after infection (called acute HIV infection). These symptoms may last for a few days or several weeks. Possible symptoms include
Fever,
Chills,
Rash,
Night sweats,
Muscle aches,
Sore throat,
Fatigue,
Swollen lymph nodes, and
Mouth ulcers.
But some people may not feel sick during acute HIV infection. These symptoms don’t mean you have HIV. Other illnesses can cause these same symptoms.
See a health care provider if you have these symptoms and think you may have been exposed to HIV. Getting tested for HIV is the only way to know for sure.
What are the stages of HIV?
When people with HIV don’t get treatment, they typically progress through three stages. But HIV medicine can slow or prevent progression of the disease. With the advancements in treatment, progression to Stage 3 is less common today than in the early days of HIV.
Stage 1: Acute HIV Infection
Stage 1: Acute HIV Infection
People have a large amount of HIV in their blood. They are very contagious.
Some people have flu-like symptoms. This is the body’s natural response to infection.
But some people may not feel sick right away or at all.
If you have flu-like symptoms and think you may have been exposed to HIV, seek medical care and ask for a test to diagnose acute infection.
Only antigen/antibody tests or nucleic acid tests (NATs) can diagnose acute infection.
Stage 2: Chronic HIV Infection
Stage 2: Chronic HIV Infection
This stage is also called asymptomatic HIV infection or clinical latency.
HIV is still active but reproduces at very low levels.
People may not have any symptoms or get sick during this phase.
Without taking HIV medicine, this period may last a decade or longer, but some may progress faster.
People can transmit HIV in this phase.
At the end of this phase, the amount of HIV in the blood (called viral load) goes up and the CD4 cell count goes down. The person may have symptoms as the virus levels increase in the body, and the person moves into Stage 3.
People who take HIV medicine as prescribed may never move into Stage 3.
Stage 3: Acquired Immunodeficiency Syndrome (AIDS)
Stage 3: Acquired Immunodeficiency Syndrome (AIDS)
People with AIDS have such badly damaged immune systems that they get an increasing number of severe illnesses, called opportunistic infections.
People receive an AIDS diagnosis when their CD4 cell count drops below 200 cells/mm, or if they develop certain opportunistic infections.
People with AIDS can have a high viral load and be very infectious.
Without treatment, people with AIDS typically survive about three years.
1 point
Which is a correct graphical representation of the organization levels of a
biological system?
Answer:
1. Biosphere
2. Ecosystem
3. Community
4. Population
Explanation:
The correct graphical representation of the organization levels of a biological system is as follows:
Cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, and biosphere. What is the level of organization of the biological system?The level of the biological system may be defined as the arrangement of structures that are usually characterized by relationships with things at higher levels that are being composed of things at the next lower level. A cell is the smallest level of organization for living things while the biosphere is the highest level of organization for living things.
A cell is the basic structural and functional unit of living organisms. The collection of cells gives rise to the formation of tissues which are combindly known as organs. Organs give rise to the organ system that completely formed a living entity.
Therefore, the correct graphical representation of the organization levels of a biological system is well represented above.
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A model of gene expression within the lac operon is shown here. If a mutation occurs in the operator (O) region of the operon that changes the sequence of nucleotides in the operator, which statement(s) predict the outcome of this mutation? Select ALL that apply.
Answer:
mRNA
Explanation:
Answer:
A and B
Explanation:
I did the question and got if wrong for y'all :)
Pls help me!!! I need help
Explanation:
option a
option b
option c
A copper atom has an atomic number of 29 and an atomic mass of 64. What
is the structure of this atom?
A. It has a central nucleus composed of 29 protons and 29 neutrons,
surrounded by an electron cloud containing 35 electrons.
B. It has a central nucleus composed of 29 protons and 64 neutrons,
surrounded by an electron cloud containing 29 electrons.
O C. It has a central nucleus composed of 35 protons and 29 neutrons,
surrounded by an electron cloud containing 29 electrons.
D. It has a central nucleus composed of 29 protons and 35 neutrons,
surrounded by an electron cloud containing 29 electrons.
Answer:
D just took the test on APX
Which of the following is not a biotic factor?
A. Giraffe
B. Lion
C. Cactus
D. Wildebeest
Answer:
cactus
dudidjdidj jdudhd
How does the ocean affect climate on land?
Answer:
1.due to land breeze and sea breeze
2.area near the ocean has mild climate
In dolphins, to have spots on the skin is a recessive trait. One spotted dolphin and one solid gray dolphin have a baby spotted dolphin. Go through the following steps to figure out the genotype of the parent dolphins.
1) what is the genotype of the spotted (recessive) parent?
Answer:
the spotted parent has the genotype ss
Explanation:
we will use s as the letter when describing the spotted trait.
since spotted is recessive, that parents have to have two little s to have the trait. Since the child also has that, we know that they will have the genotype ss. the child would have to get a little s from both parents, so the solid parent would have Ss, showing as solid, but still having the gene for spots.
TINUS
ATP is an abbreviation for adenosine triphosphate, a complex molecule that contains t
phosphates. It is the energy currency of the cell. ATP is used by organisms as energy...th
that require energy.
Which statements regarding the ATP-ADP cycle are true?
ATP synthesis takes place in the mitochondria of eukaryotic cells.
The given question is incomplete as the group of choices are not given, however, the choices are associated with the question is given below:
ATP synthesis takes place in the mitochondria of eukaryotic cells.
ATP is regenerated from ADP through the process of phosphorylation.
energy is stored in the covalent bonds between phosphates, with the greatest amount of energy in the bond between the second and third phosphate groups.
most of the readily available energy stored in ATP is stored during the manufacture of adenosine.
the ribose sugar in the model above is the direct product of photosynthesis.
Answer:
The correct answer is given below:
Explanation:
ATP synthesis takes place in the mitochondria cell organelle in the eukaryotic cells, however, a small part of ATP generation takes place in other cell regions but most of the ATP synthesis is occurs in the inner membrane of mitochondria which makes it energy house of the cell.
ATP is formed by the addition of phosphorus to ADP and this process is called phosphorylation.
Each bond of the adenosine and its three phosphates has stored energy in their covalent bonds. The last two phosphates have a high amount of energy in their bond.
why progesterone is called pregnancy hormone????
Answer:
Progesterone isn't as important during normal menstrual cycles, but it is very important in pregnancy. It is the hormone which maintains the uterus lining and also avoids the menstrual cycle from taking place in order to prevent the baby from being aborted.
Using established recombinant DNA technology, you insert a gene from a human immune cell into a bacterium. The bacterium expresses the protein corresponding to the inserted DNA. To your disappointment, you discover that the protein produced is useless and is found to contain many more amino acids than does the protein made by eukaryotic cells. Assuming that there is no mutation in the human gene, what is a reasonable explanation for why this happened
The group of choices associated with the question is -
The inserted gene does not have a start codon.
The inserted gene does not have a stop codon.
The inserted gene is not present in bacteria.
The inserted gene contained introns.
None of the above.
Answer:
The correct answer is - The inserted gene contained introns.
Explanation:
In the given case says that one gene inserted from human to bacteria that produces a protein with more amino acids than humans. In eukaryotic organisms, there is a process that removes the unwanted mRNA part during transcription and joins exons together, called splicing to form functional mRNA.
In this case. splicing does not take place as bacteria is a prokaryotic organism and splicing is exclusive to eukaryotic organisms like humans.
So introns are also translated into protein in bacteria due to lack of splicing genes.
what it means to have codominant alleles
Answer:
use spell check
Explanation:
I need help please um just look at the pictures so yea
Answer:
They release C02, which contributes to climate change.
They can cause health issues.
Explanation:
The other two are positive aspects, and these two are true.
How might green spaces help reduce the negative impact that humans have on Earth’s water supply?
It would give nature a place to fight back, and become more healthy, and less hindered. Cities mess up the evaporation cycle, and because of parks, the water is able to be soaked up by grass, and then released through evaporation. When it rains over a city, the water goes into gutters, and becomes more polluted.
Why have scientists developed vaccines?
to research medicines
to diagnose conditions
to treat illnesses
to prevent diseases
Answer:
to treat illnesses (number 3)
Explanation:
:3
Answer:
scientists have developed vaccines to prevent diseases11. Josie feels that she will never be good at
math. Her teacher tells her that completing
homework will help her practice using the
equations. Josie explains she is a right-minded
thinker and will never be good at math, Is Josie
correct? Why or why not?
Answer:
no josie is not correct,right minded and left minded thinking is a suggestive topic and not factual.all things take practise including math, Josie should try her best in math and if she needs too, study at home.
PLEASE HELP!!! How many ATP can we get from one molecule of phosphocreatine?
a.1
b.2
c.10
d.32
Phosphocreatine is a chemical compound that provides high energy to the skeletal muscles. One molecule of phosphocreatine produces one ATP molecule. Thus, option a is correct.
What is phosphocreatine?The phosphocreatine system is a way to generate ATP and energy in the body (muscles). During muscle contraction, the phosphocreatine yields a phosphate molecule that in turn produces ATP.
The phosphocreatine system provides quick and fast energy in the form of ATP molecules through the anaerobic system that does not require oxygen. It gives its phosphate group to ADP to produce ATP as,
ADP + phosphocreatine → ATP + Creatine
The ATP-PC system yields only one molecule per phosphocreatine at a very fast rate for the muscles to utilize when doing any exercise or physical activity that involves contraction and relaxation.
Therefore, phosphocreatine produces 1 ATP.
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In order for high force crossbridges to form in contracting skeletal muscle, calcium must a. bind to calmodulin to phosphorylate the myosin. b. phosphorylate the tropomyosin which moves it. c. phosphorylate the troponin to move the tropomyosin. d. bind to tropomyosin which moves the troponin. e. bind to troponin which moves the tropomyosin.
Answer:
e. bind to troponin which moves the tropomyosin.
Explanation:
Troponin (Tn) is a protein complex composed of three different proteins: troponin C (TnC), troponin I (TnI), and troponin T (TnT). This complex is found both in skeletal muscles and cardiac muscles, where TnC attaches calcium ions through four and three calcium ion-binding sites, respectively. When a muscle is relaxed, Tn attaches to tropomyosin to prevent muscle contraction. During muscle contraction, calcium channels open and cytosolic calcium ions bind to TnC, thereby Tn changes its conformation and moves the tropomyosin. This process relieves the inhibition of the interaction between actin and myosin filaments, which makes muscle contraction possible.
Which of the following is NOT a density-dependent factor in an
ecosystem?
Describe the conditions under which new species may arise.
Answer:
Explanation:i dont knowim so sorry
Answer:
New species arise through a process called speciation. In speciation, an ancestral species splits into two or more descendant species that are genetically different from one another and can no longer interbreed.
Explanation:
How many wolves of the economy in the yellow stone national park ,
Answer:
94
Explanation:
there is 94 wolves, 8 packs, and 7 breeding pairs.
Which agency is directly related to supervising and managing campgrounds
Us Forest Service
Bureau of land management
Us fish and wildlife service
National park service
Answer:
National Park Service
Explanation:
1 pts
Which of the following are examples of discontinuous variation? (select all that apply)
Answer:
what answer choices are there?
Explanation:
person's blood group or the color of a species of bird is what i think
Answer:
Hindi KO alam putang ina
Which proccess remove carbondioxide from the air?
Answer:
Photosynthesis removes carbon dioxide naturally
Explanation:
When trees or plants take CO2 out of the air and recycle it with oxygen
Which one of the following is the largest source of greenhouse gases in the atmosphere? A. the burning of fossil fuels B. chemicals released during manufacturing C. the release of carbon dioxide from cellular respiration D. Deforestation
BRAINLIEST: In dolphins, to have spots on the skin is a recessive trait. One spotted dolphin and one solid gray dolphin have a baby spotted dolphin. Go through the following steps to figure out the genotype of the parent dolphins.
1) what are the POSSIBLE genotypes of the solid grey dolphin?
2) what is the genotype of the baby spotted dolphin?
Answer:
1) Ss
2) ss
Explanation:
Spots (recessive) - s
No spots (dominant) - S
So the possible combination to get a baby spotted dolphin may be: Ss and ss
Punnett Square:
| S | s |
s | Ss | ss |
s | Ss | ss |
So the genotype of the Solid gray dolphin might have been a dominant allele and a recessive allele, which is Ss.
Moreover the genotype of the spotted baby dolphin might me ss.
Enzyme and substrate concentration What is a substrate
A place on the enzyme where the reaction occurs
A substrate can be defined as the reactant in a chemical reaction. A substrate is consumed during a chemical reaction and it is converted into product molecules.
What is a substrate molecule?A substrate can be defined as a molecule that an enzyme reacts with during a chemical reaction. The active site of an enzyme are the locations where weak bonds between the two substrate molecules can be formed, this place is loaded with a substrate molecule. An enzyme substrate complex is formed, and the enzyme's pressure on the substrate is responsible for the reaction and it become the planned reaction's result.
Some examples of substrate molecule include carbohydrates like glucose, starch act substrates for the enzymes such as salivary amylase, maltase. Amino acids, proteins act as substrate molecules for enzymes such as trypsin, chymotrypsin, etc.
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Name one other disease mentioned in the paper
in which there is now a vaccine.
Answer:
while corona is true, it is not the answer. The answer is smallpox
Explanation:
The other disease mentioned in the paper in which there is now a vaccine is Tuberculosis.
What is a Vaccine?This is a biological preparation which stimulates the body's immune response against diseases.
Tuberculosis refers to the disease which now has a vaccine known as Bacille Calmette-Guérin (BCG) vaccine.
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4. Which of the following statements about magnetic materials TRUE?
A, Magnetic materials will attract other magnetic materials,
B, Magnetic materials will be attracted to magnets,
C. Magnetic materials will be repelled by magnets,
D, Magnetic materials will repel other magnetic materials,
Answer:
All of them seems true tho
Answer:
B I think..
Explanation:
PROJECT: RESEARCH
OBJECTIVES
Write a report on the origin of life.
Take a subject of origins or a question you have and write a minimum of 500 words as a research project. Be sure to list all references and resources as part of your bibliography. Other information can be found at a library or other reference source.
To write a report on the origin of life first identify the different theories and then use reliable sources to explain these theories.
What are the theories of the origin of life?Life emerged as a result of chemical reactions that created complex structures.Life first emerged in clay that contained different chemical elements and simple substances.Organic compounds essential to life existed on ice that later melted.Life began on space.How to write a report?Look for credible articles, research reports, etc. that support and explain each of the theories.Using the information from the sources and your own words explain each of the theories, the evidence that proves it, and its flaws.Learn more about report in: https://brainly.com/question/14969693
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