Answer to Question #151127 in Microbiology for mike

Question #151127
If a man with red-green colour blindness has a child with a woman who has normal colour vision and is homozygous for that gene, what is the probability that they will have a child who is red-green colour blind?
1
Expert's answer
2020-12-17T07:03:27-0500

Red-green color blindness is X-linked meaning it cannot be found on the Y chromosome and women, in this case, can exhibit the state of heterozygous or homozygous while men can only be hemizygous.



Let Xc refer to red-green colorblindness. Note, c is recessive.

Let X+ refer to "normal". Note, + is dominant.

The woman has normal vision meaning she is heterozygous  X+Xc

Her husband is colorblind. Since he is hemizygous, his genotype must be: XcY

The children this couple can produce we cross or fertilize the genotypes of the  father and mother

XcY x X+Xc

Xc

Y

X+

X+Xc

X+Y

Xc

XcXc

XcY

The probability that the first child from this marriage is color-blind  is a quarter



Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS