1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shtirl [24]
3 years ago
5

What percentage of offspring from a cross between a homozygous type A parent with a heterozygous Type A parent is expected to co

ntain the I allele
a)100%

b)50%

c)75%

d)25%
Biology
1 answer:
snow_lady [41]3 years ago
8 0

The correct answer is option B, 50%

Let us take the following case:

Genotype of heterozygous parent - (Aa)

Genotype of homozygous parent – (aa)

Allele I  - (Aa)

Allele II – (aa)

The cross between the two is shown below:

Aa  X aa

Aa, Aa, aa, aa

There are 50 % Aa, and 50 % aa allele.  

Thus, the allele I (Aa) is 50 %.  

You might be interested in
If the two traits that Mendel looked at in his dihybrid cross of smooth yellow peas with wrinkled green peas had been controlled
nalin [4]

Answer:

c. Would have deviated from the 9:3:3:1 phenotypic ratio

Explanation:

<em>If two genes are linked together on the same chromosome, the phenotype of the F2 generation would have deviated from 9:3:3:1.</em>

Two genes whose loci are close on the same chromosome are said to be linked. Linked genes have higher frequency of recombination than genes that are not linked.

<u>Hence, while genes that are not linked assort independently to produce 9:3:3:1 phenotypic ratio at F2, linked genes do not assort independently and the higher frequency of recombination ensures that they standard phenotypic ratio is deviated from.</u>

The correct option is c.

3 0
4 years ago
If a hemoglobin molecule comes into close contact with a respiring cell, the presence of CO2 in the environment will cause hemog
lapo4ka [179]

Answer:

No, when the concentration of carbon dioxide is high, such as in peripheral tissues, CO2 binds to hemoglobin and the affinity for O2 decreases, causing it to release.

Explanation:

The O2 molecule is reversibly combined with the heme portion of the hemoglobin. When the partial pressure of O2 is high, as in the case of pulmonary capillaries, for example, the binding of O2 to hemoglobin and the release of carbon dioxide are favored, this is known as the Haldane effect. If, on the contrary, when the concentration of carbon dioxide is high, such as in peripheral tissues, CO2 is bound to hemoglobin and the affinity for O2 decreases, causing it to release, this is known as the effect Bohr.

8 0
4 years ago
A drug is contraindicated for a patient when it:
Liula [17]
Is compatable to defection or malfunction
6 0
3 years ago
Which of the following options correctly describes the behavior of a tetrad during anaphase 1 of meiosis?
Svet_ta [14]

The answer is; C

Homologous chromosomes have the same genes on the same loci. However, they may have different forms of the same gene called alleles. These sister chromosomes, of a homologous pair, separate during anaphase I of meiosis. The two daughter cells formed will, therefore, have half the genetic material as the parent cell. This is because they will only have one set of the genes (as in diploid organisms) and are called gametes.


7 0
3 years ago
What is the hawaiian islands formed by one or several of these which bring new rock to the surface of earth?
lord [1]
Volcanoes, the lava when cooled becomes igneous rock!
4 0
3 years ago
Other questions:
  • Select all that apply.
    15·2 answers
  • A chronic nervous system disease characterized by progressive muscle rigidity and involuntary tremors is called:
    11·1 answer
  • Can any one organism in the food web be a consumer, an omnivore a predator and a pr Justify your answer ?
    15·1 answer
  • True or False? Invertebrate animals represent the largest and most diverse group of animal species on the planet.
    13·1 answer
  • Surrounds a plant cell, providing support
    9·1 answer
  • How might a scientist display data on the territories of different groups of chimpanzees? What would this be an example of?
    8·1 answer
  • You examine an unknown cell under a microscope and discover that the cell
    11·1 answer
  • Bernice is preparing a report on evidence for the common ancestry of species. She includes the figure of forelimbs shown.
    11·1 answer
  • Half of the moon is always lit except during an eclipse.<br><br> True or false?
    7·2 answers
  • Can u plz tell me five facts about the primary succession?!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!