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umka21 [38]
3 years ago
10

In humans, the allele for red-green color blindness is X-linked and recessive (Xr; the dominant allele is called XR). A man with

normal color vision marries a color-blind woman who gives birth to a color-blind daughter. What can be inferred from this information?
Biology
1 answer:
taurus [48]3 years ago
8 0

Answer:

It concludes that the man is not the real father of the girl child.

Explanation:

Sex-linked or the X linked characters are the traits that inherited in a change or mutation in X chromosomes that cause the phenotype change in the male, which are homozygous for the gene as only possess one X chromosome and one Y chromosome, and Females if they are homozygous for the gene.

In the question, Man has a normal color vision (XrY) that means he has no mutated allele of color blindness. female has color blindness so that means she is a homozygous chromosome for the gene. Cross between these two results in 50% carrier daughters (XrXR) and 50% color blindness son (XRY). It means there is no chance for the color blind daughter.

Thus, the correct answer would be the man is not the real father of the girl child.

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According to the theory of evolution, what will most likely happen to a species in which half the individuals are better suited
kicyunya [14]

Probably the availability of each kind of food is different from the other. So the half of the species that has more food available would outcompete the other half. Therefore, the correct answer is C. One half of the species will outcompete the other half of the species.

3 0
1 year ago
Lipase is an enzyme that breaks down fats
Amanda [17]

Answer:

3a. As we know and also mention in the question that lipase is an enzyme that digested and break down the fats into fatty acid and it is also known that the action of an enzyme is as follows:

Enzyme + substrate <===> Enzyme-Substrate <====> Enzyme + Product

and here, E+S <----> ES<---->E+P

So, E is Lipase  as the enzyme, S is fats,  and P is fatty acids

3b. The control group is in this experiment or research is the group in which activity of the lipase is tested with the help of the chemical Orlistat, present in the diet pill as the control group is used to compare the or test the results of the independent variable's response.

3c. The scientist's prediction would be that in the control group fats will not be digested by the lipase into fatty acids and will not lead to any side effects.

8 0
3 years ago
Trypanosome infections evade attacks by host immune systems through which of the following mechanisms? A. insertion of its DNA i
lapo4ka [179]

Answer:

<h2>Through production of news cell-surface proteins with a different molecular structure by each new generation. Letter B</h2>

Explanation:

The life cycle of theses paratises extracellular alternate between the salivary glands of the insect transmitter and the blood of the mammal. During the set prior to the entry into the host, the metacylic parasites express a dense over formed by the Variant Surface of Glycoprotein, after entering to the mammal host they transform  into a morphology that stays in the bloodstream.

<em>The parasites have to manipulate hosts cells in order to avoid the production of antimicrobial molecules and to benefit from growth factor production.</em>

<em>Intracellular protozoa have a remarkable adaptive capacity as they are able to resist killing by remodelling the phagosomal compartments where they reside and by interfering with the signalling pathway that leads to cellular activation. </em>

3 0
3 years ago
Which of the following are part of the chemiosmotic coupling model? Protons are pumped out of the mitochondrial matrix into the
Lina20 [59]

The correct answer is: Protons are pumped out of the mitochondrial matrix into the intermembrane space

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Electrons from electron carriers (NADH and FADH) donate electrons to the electron transport chain and that causes changes in protein complexes of electron transport chain. As a consequence, protein complexes pump H+ across a selectively permeable cell membrane from the mitochondrial matrix into the intermembrane space of mitochondria.  

H+ can only get back and pass through the inner mitochondrial membrane with the help of ATP synthase (down their electrochemical gradient). ATP synthase turned by the force of the H+ diffusing through it forms ATP by adding a phosphate to ADP.

4 0
3 years ago
Veins returning to the heart can close to prevent the backflow of blood. Which component in the veins contributes to this proces
givi [52]
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8 0
4 years ago
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