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
The central nervous system (CNS) contains a number of components that perform specific functions within the body. Some functions
ivolga24 [154]
The part of the CNS that is responsible for these functions is the brain stem. 

The brain stem is the part of the brain that control very basic functions of your organism and lets them work together as they should. The other parts that are mentioned all have much more specific and also different roles. 
3 0
3 years ago
Read 2 more answers
Think about all of the figures that illustrate tracheids. What are the functions for tracheids? How can you identify a tracheid
kotykmax [81]

Answer: The tracheids have important functions in the plant.

Explanation: The mechanical support is provided by the lignified walls of tracheid cell. the helps in other functions of the plant such as transporting water and getting the solute from the root to the stem and eventually the leaf of the plant.

The tracheids are most useful in the gymnosperms where elements need to be transported.

Identifying a tracheid in a cross section is quire easy as the tracheid cells fit into each other neatly and piled up similarly and have identical shapes as well which makes them obvious from other cells.              

The two examples of tracheid plans could be

  • pteridophytes
  • gymnosperms  

The most common thing that could be found in traceid plant is that this cells are mainly present for transporting either water other solutes in the plant body.

4 0
3 years ago
What type of social problems were there during the industrial revolution?​
Ray Of Light [21]

How the industrial revolution raised the quality of life for workers and their families

Sections.

  • An Increase in Real Wages.
  • Untenable Arguments.
  • Technological unemployment and underemployment.
  • Pollution and Urban Conditions.
  • Child Labor.
  • Capitalism and “the spirit of the age”
  • Government Intervenes.

Explanation: say thanks to google

8 0
3 years ago
Read 2 more answers
Which statement about bones is
SSSSS [86.1K]

Answer:

The correct answer is:

C. Blood vessels run around bones and not through.

4 0
2 years ago
Which statement best explains why earths outer core is in liquid form?
Marizza181 [45]
The iron-nickel alloy melts cause of the hot temperatures
5 0
3 years ago
Other questions:
  • Will give Brainliest (8th grade science) HELP
    6·1 answer
  • If the wild-type codon is ggu, how many single-base substitutions will result in an amino acid substitution? include any changes
    10·1 answer
  • A vaccine works to protect a mammal from a specific virus by having the mammal's body produce antibodies. The actual vaccine con
    7·2 answers
  • choose the best option: Annual rings are the number of : (a) internodes in a stem (b) rings of vascular bundles in a monocot ste
    8·1 answer
  • BRAINLIESTTT ASAP!!
    12·1 answer
  • A substance that has 10H+ ions and 9OH- ions will be:
    14·1 answer
  • 4. Light energy is converted into chemical energy (glucose) through the process of (LT-12)
    5·1 answer
  • List six changes that take place if you smoke.
    5·1 answer
  • The Moon's orbit of Earth is due to the attractive forces explained by Newton's Universal Law of Gravitation. What
    14·1 answer
  • According to the article, what is the cause of sick building syndrome and what are the advantages of this cure?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!