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
alukav5142 [94]
3 years ago
9

A woman who is a carrier for colour blindness (X-linked recessive) has children with a man who has normal colour vision. A. What

are the genotypes of the man and woman? (2 marks) B. What percentage of their children do you expect to be colour blind? (1 mark) C. What proportion of their children will be carriers of the allele for colour blindness? (1 mark) D. Is it possible for the couple to have a girl who is colour blind? Why or why not? (2 marks)
Biology
1 answer:
viva [34]3 years ago
5 0

Answer:

Explanation:

The Genotype of the  woman is XCbXN

The man XNY

Since the allele for the color blindness is carried on one of the X -chromosomes of the  carrier mother, then  the male children will be color blind or carrier deopending on the defective gene they inherited. Since they will receive the defective or normal  allele from the  mothers,but the female will carriers or normal because they will inherit either defective allele or normal allele from the mother,but normal  X allele from the father.

Assuming the colorbind gene was inherited by One of the boys, and the girls take the defective genes

1. XNY vs XCbXN.Then the one of the  boys will be colorblind  and the one of  girls will be carriers. XNXCb, XNXN, XCbY,XNY  50 %

2.If the two boys take the effective genes from the mothers. and none of the girls take the defective alelle

Then the two boys will be colorblind and the girls will be carrries XcbY,XcbY and XNXN XNXN.(normal girls).

The proportions that will be  the females  since the girls can only take the defective allele from one of the normal and defective allele from the mother. Assuming the girls  take the defective allele from the mothers and take normal from the father,they will all  be carriers,since the X of the father is normal.

They can not have a color blind girl.Since the father is normal It takes two colorblind X-chromosome to give a girl.

You might be interested in
Given an atom with 8 protons how many electrons are there
suter [353]
8 electrons if it is a neutral atom.
8 0
3 years ago
Even though water, h2o, is important to all life as we know it, it is, itself, a(n) __________ compound.
Natasha_Volkova [10]
Inorganic compound.....
5 0
3 years ago
Read 2 more answers
How do carrier proteins differ from channel proteins in their role as gatekeepers of the cell? carrier proteins expend energy to
Lelu [443]
<span>"Carrier proteins bind to the substances they transport across the membrane via facilitated diffusion, whereas channel proteins provide a pore for substances to move across the membrane via facilitated diffusion."

This is the most correct option.
The main difference, when comparing these two gates of transportation across a membrane through the same process (via facilitated diffusion or any other), is that carrier proteins bind to the substances they transport and only communicate with one environment of the cell (whether intracellular or extracellular) at the time, while channel proteins let substances move across the membrane without any binding being opened to both cell environments.</span>
4 0
3 years ago
Which is NOT true of smooth muscle? A. They use peristalsis to move substances through tubes. B. They are found in the hollow pa
aliya0001 [1]

Answer: the answer is C

Explanation: I been trying to find the same answer for this exact question for acellus and C was the correct answer

7 0
2 years ago
Lymphatic vessels remove excess fluid from tissues. Often after mammexront( the surgical procedure to remove of all or part of a
stiks02 [169]
When the lymphatic vessels are damaged they will not be able to remove all the excess interstitial fluid from tissues. So edema is seen in the arm of that person because there is excess fluid in the interstitium.

Ways to reduce edema would be movement and elevation of that area(your arm) compressing and messaging it. These all help with the fluid entering the lymphatic vessels and leaving the interstitium. Another important factor is reducing ur salt intake so the edema doesn’t progress.
3 0
3 years ago
Other questions:
  • Chloride ions cannot move out of cells by simple diffusion.
    15·1 answer
  • Computers are able to continue their operation even when problems are present.
    6·1 answer
  • Suppose the human gene coding for hemoglobin is inserted into a bacterial plasmid. A bacterial culture is transformed with the r
    12·1 answer
  • Energy required for life mostly comes from _____. nuclear energy solar energy geothermal energy potential energy NEXT
    5·2 answers
  • Which reproductive cycle allows viruses to use the host cell to make copies of the virus check all that apply
    12·1 answer
  • Why is the asteroid belt between Mars and Jupiter?
    12·1 answer
  • Dna is found in both prokaryotic and eukaryotic cells true or false
    13·2 answers
  • If proteins do not have the correct structure, they cannot function properly. Protein misfolding is a cellular malfunction that
    14·1 answer
  • Consider this plant cell.
    12·2 answers
  • Assume that (B) is dominant and (b) is recessive: bb mates with bb
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!