A marriage is solemnized between colour blind male with a normal female whose parents eye- sight was also normal. Then what percentage of children born will have the probability of being colour blind?

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(b) 50% — Colour blindness is specifically linked to defects within the X chromosome. For colour blindness to be present all ‘X’ chromosomes within an individual have to be affected, and since men only have one X chromosome and women have two the chances of men being impacted are exponentially higher. However, in this case, it would seem that due to the genetic inheritance of the mother the chances of their child being colour blind would be approximately 50% because each parent is a carrier. However, the chances of inheriting a colour blind X chromosome would be twice as likely for a female child. Below is how this scenario breaks down, where the lower case x represents the affected X chromosome. M: xY (male) F: xX (Female) xx—-Female child (colour blind) xX—Female Child (not colour blind but a carrier) Yx—Male Child (Colour Blind) YX—Male Child (not colour blind and not a carrier) So, the correct answer is '50%'. Classification of Living

Answer

(A) 25%

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(C) 100%

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(D) 0%

A marriage is solemnized between colour blind male with a normal female whose parents eye- sight was also normal. Then what percentage of children born will have the probability of being colour blind?

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