A color-blind man marries a woman whose fathe | vedclass

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(C) Color blindness is an $X$-linked recessive genetic disorder.The genotype of the color-blind man is $X^cY$ (where $X^c$ is the gene for color blind

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$50 \%$ of sons will be color-blind.

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(C) Color blindness is an $X$-linked recessive genetic disorder.The genotype of the color-blind man is $X^cY$ (where $X^c$ is the gene for color blindness).The woman's father was color-blind,so the woman is a carrier: $X^cX$.When a cross occurs between $X^cY$ and $X^cX$:Offspring: $X^cX^c$ (color-blind daughter),$X^cX$ (carrier daughter),$X^cY$ (color-blind son),$XY$ (normal son).Thus,there is a $50 \%$ probability that the sons will be color-blind.

Column $I$	Column $II$
$(a)$ Sickle cell anaemia	$(x)$ Homogentisic acid
$(b)$ Alkaptonuria	$(y)$ Melanin pigments are absent
$(c)$ Albinism	$(z)$ More amount of phenylalanine
$(d)$ Phenylketonuria	$(w)$ Defective haemoglobin

$A$ color-blind man marries a woman whose father was color-blind. What is the probability of color blindness in their children?

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Column $I$ Column $II$

$(a)$ Sickle cell anaemia $(x)$ Homogentisic acid

$(b)$ Alkaptonuria $(y)$ Melanin pigments are absent

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