A husband and wife have normal vision, although both of their fat...

Question

A husband and wife have normal vision, although both of their fathers are red–green color-blind, an inherited X-linked recessive condition. What is the probability that their first child will be (a) a normal son, (b) a normal daughter, (c) a color-blind son, (d) a color-blind daughter?

Accepted Answer

Hello everyone and welcome to today's video. So an unaffected father and a color blind mother had a child with klein falter and normal eyesight. This is because the non disjunction occurred in blank. So where did non disjunction occur in this client filter case? Well, in order to do this, we're going to be needing to recall a few things. Remember that client filter is also known as the X. X. Y syndrome. And it's because the effect that is going to have an extra copy of the X chromosome. Remember also that the effect that is usually going to be boys. Now, where do we know where this X chromosome is going to be coming from this extract lined filter X chromosome. Because we need that in order to solve this problem. Well, we know that the mother is going to be colorblind and the father is not going to be colorblind. We also know that the child is not color blind, Just like the dad. Well remember that color blindness is an excellent recessive trait. If the mother was the one donating this X chromosome, then the child will be color blind, but he's not. So it must be coming from the dot. So that that is donating the X. And the Y chromosome because of this, we're going to cancel out answer choices B and D. Which had the mother being the cause of this client filter disease. Now when exactly did this occur? Was in the second or was it in the 1st May of activation of the father? Well, the first may ah tick division of the father is going to separate the X. And the Y chromosomes. The second main, chaotic division of the father is going to separate the X. And the excesses were committed and the Y. And the Y. Sister commented This first biotic division must be the one that failed because this is what the father donated to its offspring. Because of this, the correct answer choice is going to be answer choice. The first main idiotic division of the father. That is the final answer to our question. And I really hope this video helped you.

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A husband and wife have normal vision, although both of their fathers are red–green color-blind, an inherited X-linked recessive condition. What is the probability that their first child will be (a) a normal son, (b) a normal daughter, (c) a color-blind son, (d) a color-blind daughter?