Test crosses are used to determine the genotype of an individual that expresses a dominant trait by crossing this individual which an homozygous recessive individual expressing the recessive trait. The pollination experiment could be a test cross.
What is a test cross?
Test crosses are experimental crosses carried out to determine the genotype of one of the involved individuals.
Test crosses include a homozygous recessive individual and another individual of an unknown genotype whose phenotype we already recognize.
The main goal is to know if the individual of the unknown genotype is a heterozygous or a homozygous dominant individual.
If it is heterozygous,
→ 50% of the progeny will be heterozygous and express the dominant phenotype,
→ 50% homozygous recessive expressing the recessive phenotype.
If it is homozygous, the whole progeny will be heterozygous and will express the dominant trait.
In the exposed example, we have two traits: tall and short.
We will assume a diallelic gene codes for this feature, and expresses complete dominance.
Dominant allele T codes for tallRecessive allele t codes for shortTo determine if tall plants are homozygous dominant or heterozygous we will separate them and produce controlled test crosses with short plants, which are homozygous recessive.
The test cross between homozygous recessive plants and homozygous dominant plants will only produce tall plants.
Parentals) tt x TT
Gametes) t t T T
Punnett square) T T
t Tt Tt
t Tt Tt
F1) 100% heterozygous individuals, expressing the dominant tall phenotype.
The test cross between homozygous recessive plants and heterozygous plants will produce tall and short plants.
Parentals) tt x Tt
Gametes) t t T t
Punnett square) T t
t Tt tt
t Tt tt
F1) 50% heterozygous individuals Tt, expressing the dominant tall phenotype.
50% homozygous recessive plants tt, expressing the recessive short phenotype.
In conclusion, the pollination experiment to identify whether a tall pea plant is purebred or heterozygous is a test cross.
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Which of the following is true about ischemic stroke? a. Often caused by emboli from the basilar arteries b. Has risk factors that include atherosclerosis c. Can be a result of a hypercoagulable state d. Results from hemorrhage into brain tissue Is associated with acute hypertension
Answer: Option B.
Has risk factors that include atherosclerosis
Explanation:
Ishchemic stroke has a risk factor that include Atherosclerosis because it is when blood clot causes a blockage to artery that supplies blood to the brain.
This is major caused by buildup of plagues or deposition of cholesterol ( atherosclerosis). The blockage reduces the blood flow and oxygen to the brain, which cause damage or death of brain cells
If the arteries become too narrow, blood cells may collect and form blood clots.
label the four types of weather fronts.
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The type of front depends on both the direction in which the air mass is moving and the characteristics of the air mass. There are four types of fronts that will be described below: cold front, warm front, stationary front, and occluded front.[tex]<font color= green>[/tex]
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what is maeant by sexual reproduction
Answer:
Sexual reproduction is a mode of reproduction involving the fusion of haploid female gamete (egg cell) and haploid male gamete (sperm cell). The fusion of these gametes occurs at fertilization resulting in the formation of a diploid zygote. ... Two major types of sexual reproduction are syngamy and conjugation.
Explanation:
Answer:
The production of a new living beings by intercourse of two different genes is called sexual reproduction.
Explanation:
In most higher organisms, one sex (male) produces a small motile gamete which travels to fuse with a larger stationary gamete produced by the other (female).Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete with a single set of chromosomes combines with another to produce an organism composed of cells with two sets of chromosomes.
Hope it helps you:)!!!!!!!!!!!
The respiratory system is divided into two parts i.e the air passageway and the lungs. Explain the air passageway and its parts.
Answer:
It is a channel or part through which air passes specifically : an anatomical part (such as the pharynx and bronchial tubes) involved in respiration Pertussis is a bacterial infection of the air passages leading to the lungsA bacterial culture is being tested for its ability to reduce nitrate. After incubation and growth of the bacteria in nitrate broth, there is no accumulation of gas in the Durham tube. The test for the presence of nitrite is colorless. When zinc powder is added, a bright red color develops. Interpret these results.
Answer:
All this combination of reactions is summarized in that the bacteria reduced nitrate, that is, they added protons to said compound, giving nitrite as a product.
By promoting the appearance of nitrite and that it increases in its concentrations when the zinc dust is thrown away, it becomes reddish since there was a change in pH, that is, the medium was acidified.
Explanation:
Some bacteria take nitrate as a source and end up generating an oxide reduction reaction that gives nitrite as a product, if this reaction advances in a chain, that is, the nitrite is reduced after the nitrate, the product in the future would be ammonia
Which tissue transmits signal to then brain?
Answer:
The Spinal Cord Transmits Signals to and from the Brain and Commands Reflexes The spinal cord is an elongated cylinder of neuron cell bodies, bundles of axons and other cells, protected by connective tissue and bone.
Explanation:
It connects to the brain at the medulla oblongata and runs down the vertebral column, the hollow tunnel enclosed within the vertebrae of the spine. The spinal cord is part of the central nervous system and serves as a kind of superhighway. Sensory information and motor commands travel up and down, heading to and from the brain. These signals speed in and out of the spinal cord via spinal nerves—the “on-ramps and off-ramps” that branch out to supply the limbs, torso, and pelvis. Some incoming signals demand a simple, immediate response. The spinal cord can shoot out a reflex command without bothering the brain.
What happens when trees are buried before they decay
Archaea prokaryotes are prokaryotic in nature. One of the differentiating characteristics between them is that eubacteria have what in they're cell walls
Answer:
Eubacteria have cell walls made up of
chains of peptidoglycan.
Explanation:
Eubacteria have cell walls that cell wall composed of cross-linked chains of peptidoglycan. The peptidoglylcan is a polymer that combines both amino acid and sugar chains. Eubacteria have peptidoglylcan in their cell walls because it's play structural role in them , giving strength and rigidity, counteracting the osmotic pressure of the cytoplasm and also help during binary fission in reproduction.
Organisms that swim freely and maneuver actively in the water column are called what?
Answer:
Zooplankton - Animals (mostly microscopic) which drift freely in the water column.
Explanation: Zooplankton, small floating or weakly swimming organisms that drift with water currents and, with phytoplankton, make up the planktonic food supply upon which almost all oceanic organisms are ultimately dependent.
Hope this helped!!
Predicting when an earthquake will occur is known as _______. _______ energy is what gathers in a fault through strains. When owners of established buildings take the initiative to reinforce existing structures so that they can withstand severe earthquakes, they're participating in _______. A tsunami in Japan caused a meltdown of reactors at _______. Respond to the following based on your reading. Briefly discuss how strain in a fault can be determined and used to produce an earthquake forecast.
1. forecasting
2. Potential
3. seismic retrofitting
4. FD power plant
5. The best way to determine how strain accumulates in a fault is with GPS measurements of plate motion. As ground on each side of a fault moves, the potential energy that accumulates in the fault can be estimated and used to forecast the rough timing, magnitude, and location of an earthquake.
Filling up the gaps in your question
Predicting when an earthquake will occur is known as Forecasting Potential energy gathers in a fault through strains They are participating in seismic retrofittingA Tsunami in Japan caused a meltdown of reactors at FD power plantStrain in a fault can be detected with the use of GPS measurements
Strain in a fault can detected with the use of the readings from GPS indicating the movements of the plates on each side of a fault. As These movements occur, potential energy is accumulated in the fault and this can be used to predict the time and magnitude of an intending earthquake.
Hence we can conclude that the gaps in your questions are correctly filled as :
Forecasting Potential energy seismic retrofitting and FD power plant.Learn more about earthquakes : https://brainly.com/question/248561
Smaller sub-unit molecules that bond together to form a polymer
called?
atom
monomer
lipids
water
Answer:
monomer is the answer
what is reproduction?
Answer:
Reproduction is the biological process by which new individual organisms – "offspring" – are produced from their "parents".
Explanation:
Violet Beauregarde is a character in Charlie and the Chocolate Factory who swelled after eating blueberry gum. What is causing Lisa’s body to swell?
I inferred you are referring to Violet instead.
Answer:
she chews "Gobstoppers" which are not meant for chewing.
Explanation:
Remember, it all started when Violet entered the inventing room and she began to show an interest in gobstoppers, believing them to be similar to gum, even though they were not meant for chewing.
After ignoring the warning from Wonka, she begins chewing the gum which leads her body to swell.
What is a scientific word that starts with homo? Sorry if its the wrong subject, I couldn't find science.
Answer:
homogeneous
Explanation:
Answer:
homogamy
homogeneously
homospory
homologically
homonym
homoeroticism
homograph
The extensive connective tissue network, which encircles the bases of the pulmonary trunk and aorta and the valves of the heart, is called the ________ of the heart.
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The extensive connective tissue network, which encircles the bases of the pulmonary trunk and aorta and the valves of the heart, is called the Cardiac skeleton of the heart.
Explanation:-The cardiac skeleton consists of four bands of dense connective tissue, called fibrous rings, that surround the base of the pulmonary trunk, aorta, and mitral and tricuspid valves.MayInteresting facts about Human[♥️]!!The average heart is the size of an adult fist.Your heart will beat about 115,000 times each day.The beating sound your heart makes is caused by the opening and closing of its valves.The human heart weighs less than one pound, but a man’s heart is typically two ounces heavier than a woman’s.A woman’s heart beats slightly faster than a man’s.There is such a thing as a broken heart. Symptoms are similar to a heart attack but the cause is usually stress and not heart disease.Laughing is good for your heart. It reduces stress and gives a boost to your immune system.━━━━━━━━━━━━━━━━━━━━
Hii answer to question 12 please?
Answer:
D
Explanation:
This is an experiment to prove that photosynthesis or exposure of light produces starch.
Only the D part will contain starch because D part shows green color which is the sign of starch formation due to photosynthesis while the covered region and white region will not form starch because they do not undergo photosynthesis process.
Hence, the correct option is "D".
Answer:
D
Explanation:
^^^
Why might buying a more expensive product made of recycled materials be a smarter purchase in the long run?
Answer:
Explanation:
Recycled materials are often more expensive but they save recourses such as trees or minerals
Pollution that runs off the land often combines with sediments at the bottoms of bodies of water. In this way, fish may become poisoned. This is an example of how fish interact with the _____.
Answer:
Pollution that runs off the land often combines with the sediments at the bottom of the ocean or other types of water. In this way, fish may become poisoned. This is an example of how fish interact with the following are types of rocks that make up the lithosphere exceptThe amount of carbon dioxide in the atmosphere would greatly increase the population .
Is the bacteria in pond water living?
Answer:
Bacteria in pond water IS living
Explanation:
Any bacteria is living, it is a single cell organism.
An organism is unicellular autotrophic and ancient what domain does this organism does not belong
Answer:
Eukaryote
Explanation:
“Ancient” refers to archae. Archae and bacteria are the prokaryotic two domain out of three. In fact eukaryote have protists and plants which are able to perform autotrophic behavior. But unicellular wouldn’t define eukaryotes.
The glenohumeral joint that articulates the humerus to the pectoral girdle is a highly mobile joint. This mobility comes at a cost because ________.
Answer:
the joint is relatively unstable and can easily dislocate
Explanation:
The glenohumeral joint is a ball and socket type of joint and it is found between the scapula and the humerus. The ball and socket joint helps in its ability to perform rotational movement.
The glenohumeral joint that articulates the humerus to the pectoral girdle is a highly mobile joint. This mobility comes at a cost because the joint is relatively unstable and can easily dislocate.
Which organisms transform nitrogen to a form that is useful to plant?
Answer:
bacteria
Explanation:
Bacteria helps in a process called ammonification where ammonia is oxidized to nitrites and then to nitrates and these nitrates are the most usable form for plants.
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TIME REMAININ
59:15
About how long ago did our solar system start to form?
O About 5 million years ago
O About 14 million years ago
About 5 billion years ago
O About 14 billion years ago
Answer:
About 5billion years ago is the correct option.
Explanation:
Hope this will help you :)
Answer:
About 5 billion years ago
Explanation:
You are comparing a reaction that produces a chemical change and one that produces a physical change. What evidence could you use to determine which type of change is occurring?
Answer:
There are no specified options in this question but the answer will be provided elaborately in order to fully comprehend it.
Please find the detailed answer in the explanation section.
Explanation:
Matter undergoes two types of changes viz: physical and chemical changes. A physical change, as the name suggests, involves a change in the physical nature of matter. A physical change does not change the chemical property of the substance involved. Since there is no chemical modification to the substance, no new substance is formed from a physical change. Hence, the substance only undergoes a change of state. For example, water (liquid) changing to ice (solid) is a physical change. Physical changes are usually reversibleb i.e. can be changed back to their previous form.
Chemical change is another type of change in which substances undergo a change in their chemical properties to form new substances. Changes like formation of gas bubbles, change in temperature, color change etc will be noticed during chemical changes. Examples of chemical changes are rusting, burning because they irreversibly change the chemical composition of the substances involved etc.
In a nutshell, in order to determine the type of change occuring in a reaction, one should look out for whether or not there is a change in nature of the substance leading to the formation or not of a new substance.
Answer:
Answer is in the Explanation Section
Explanation:
Either way, matter, physical and chemical changes are pretty much the same... Put it this way if you have a match and you light it what happens? If you said it burns your right! If not it is okay we all are not right. Because it is with the chemicals it's made with and adding oxygen makes it burn and breathe so it can burn freely.
DUNNO IF YOU CAN ADD COMMENTS ON MY ANSWER.
A scientist asked a question that was based on an observation. What should the scientist do next? The scientist should form a hypothesis and design an experiment. The scientist should collect data and organize it into tables. The scientist should draw conclusions based on the observation. The scientist should record and communicate his hypothesis and results.
Answer:
A. The scientist should form a hypothesis and design an experiment..
Explanation:
Edge 2021
To test hypotheses, which are proposed explanations for scientific observations, The quantifiable variables specified in a particular hypothesis serve as the basis for designing experiments. But this is just the beginning. Thus, option A is correct.
What is scientific hypothesis and design?Researchers create hypotheses to direct experimental design when performing scientific studies. A tested and falsifiable explanation is referred to as a hypothesis.
It is an improbable, untested solution to your research question. In some cases, writing many hypotheses that speak to various facets of your research issue will be required.
It is a causal design in which the effect of the independent variable on the dependent variable is observed.
For instance, one tracks how an independent variable like pricing affects a dependent variable like client satisfaction or brand loyalty.
Therefore, The scientist should form a hypothesis and design an experiment.
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Help me guys please. What is a mutation? What causes mutation?
Answer:
A mutation is a change in a DNA sequence. Mutations are commonly caused by mistakes during DNA replication. However, they can also be caused by ultraviolet radiation, exposure to chemicals called mutagens, and infection by viruses. But, a mutation usually occurs when a nucleotide in the DNA gets changed, causing the nucleotide sequence to be copied incorrectly which leads to the wrong code for a protein. This can sometimes be fatal.
Hope that helps.
Which phrase describes a lava plateau? O steep-sided mountain O gently sloping mountain hardened magma in a pipe O volcanic material in valleys
Answer:
B. Gently sloping mountain hardened magma in a pipe
Explanation:
A volcanic plateau is a plateau produced by volcanic activity. There are two main types: lava plateaus and pyroclastic plateaus.
The phrase that describes a lava plateau is "hardened magma in a pipe".
A lava plateau is a large, flat area of land that is formed when lava from a volcanic eruption spreads out over a large area and hardens.
What is magma ?This hardened lava is called "magma", and it typically comes from a "pipe" or vent that connects the Earth's surface to a magma chamber deep beneath the ground. As the lava flows out of the vent, it cools and hardens, creating a flat, solid surface that can stretch for many miles in all directions.
So, the phrase "hardened magma in a pipe" best describes a lava plateau. The other phrases, "steep-sided mountain" and "volcanic material in valleys", describe different types of volcanic landforms.
A steep-sided mountain is a type of volcano that is characterized by a tall, narrow peak and steep slopes. These volcanoes are formed when magma rises up through the Earth's crust and is forced to the surface through a narrow vent.
As the magma erupts, it forms a steep-sided cone-shaped mountain, which can rise to great heights depending on the amount of magma that is ejected.
Volcanic material in valleys is a type of volcanic landform that is characterized by deposits of volcanic ash and other materials that have accumulated in valleys and low-lying areas.
These deposits are usually the result of explosive volcanic eruptions, which can send ash, rocks, and other materials high into the air. As the materials fall back to the ground, they can accumulate in valleys and depressions, forming layers of volcanic material that can be several feet thick.
In summary, while "hardened magma in a pipe" describes a lava plateau, "steep-sided mountain" and "volcanic material in valleys" describe different types of volcanic landforms.
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Which of the following terms refers to the combination of
DNA and proteins in the cell nucleus?
A. Allele
B. Chromosome
C. Gene
D. Chlorophyll
true or false a theory is a scientific idea that has been proven true
Answer:
true
Explanation:
i hove this will help u
It is known that many trees lose their leaves in response to decreasing day length. As a result, you think that Gingko trees may also lose their leaves in response to decreasing day length. This statement is an example of:
Answer:
the loss of trees
Explanation: