If a couple's daughter is color blind, does the father have normal color vision, or is he color blind too??

Question

It has to do with genetic traits.

Answer 1

Yes. Her father must be color blind, and her mother must be a carrier (she may or may not be color blind as well).

Color blindness is an X-linked recessive trait. The daughter must be XcXc. Since the father has only 1 X (which he must pass to his daughter), he must be XcY.

The mother will be either XXc (not color blind) or XcXc (color blind). If she is XXc, then her daughters and sons have a 50% chance of being color blind. If she is XcXc, then all of her children will be color blind (assuming that they have the same father).

Answer 2

If this question has to do with basic genetics, then yes.

Color blindness is a sex-linked trait, meaning that it is carried on the X chromosome.

Men have a combination of XY chromosomes and women have a combination of XX chromosomes.

For women, if one X chromosome is showing a genetic abnormality or is recessive for a sex-linked disorder (such as colorblindness), then the other X chromosome will somewhat "take over" for the other and make sure that the actual abnormality is not expressed.

However, if BOTH X chromosomes are recessive for a sex-linked disorder, then both X chromosomes express it, and in that case, the daughter would be color blind.

The only way for that to happen would be for the father to be color blind and for the mother to be a carrier of the disorder (X(recessive), X(dominant) or to also be color blind (X(recessive),X(recessive)).

Since the father has only one X chromosomes (and when having a daughter, each parent donates one chromosome), he would have to be color-blind to give an X chromosome which causes color-blindness in the daughter.

So, at least to my knowledge, the answer to your question is yes.

If you are talking about the son, on the other hand, that's a completely different problem.

Answer 3

Looking at it biologically, he has to be colorblind.

BUT, looking at it mathematically there is a tiny possibility, that the daughter could be colorblind even if the father has normal vision.

First - The normal case.
We are talking about red-green color blindness, which is a sex linked trait, encoded on the X chromosome. So the father is XY and therefore colorblind and mother is XX and either only carrier (one X is affected) or also colorblind (both are affected).

Second - The mathematical case.
Looking at blue-yellow color blindness or achromatopsia, these are autosomal which means not sex linked. Therefore father AND mother both could only be carriers and their child would inherit both affected chromosomes and be colorblind. But because these traits or so uncommon (< 1 out of 10'000) it is biologically an unknown case and only mathematically possible when looking at the actual genetics theory.

Answer 4

It's impossible for a female with color blindness to have a father with normal vision because she needs a recessive trait from each parent

Answer 5

If the color blindness gene is X-linked, then the father must also be color blind.

Answer 6

there'll be 0 danger of the daughter being colour blind, in spite of the easy undeniable truth that she ought to finally finally end up being a service of the trait. The gene is carried on the X chromosome, of which grownup adult men truly have one. for this reason, grownup adult men should not be in a position to be companies, they could truly be colour blind or now no longer colour blind. once you concentration on that women people persons carry 2 X chromosomes, they might have one carry a the defective gene for colorblindness and one time-honored duplicate, and nonetheless now no longer be colour blind, once you concentration on that they have got one operating duplicate. to produce a colour blind daughter, the guy ought to ought to desire to be colour blind, and the female ought to ought to desire to a minimum of be a service, that would offer 50-50 odds of a daughter who change into colour blind.

Answer 7

No, the father is not color blind. If this has to do with genetics, retina or pupil is nowhere linked to genetics so no way!

Answer 8

both parents would have to have the resessive gene represent color blind gene-c so your mom would be Cc and dad would be Cc so the answer is he would have normal vision