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Sex Determination in Humans

Which genotyp...

Question

Which genotype will indicate colour blindness in male?

A

X^{C} Y

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B

X^{C} Y^{C}

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C

X^{C} X^{C}

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D

A^{C} A^{C}

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Solution

The correct option is A $X^{C} Y$
Answer(a) $x^{c} y$
Colour blindness is x-linked recessive disorder. A person cannot distinguish shades of red & green or blue and green
Males are affected more often than femals as the gene responsible is located on x chromosome.

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Similar questions

Q. A colour blind male

(X^{c} Y)

marries a carrier female

(X^{C} X^{c})

. Possible genotype of daughters will be _______________.

Q. A colour blind man

(X^{C} Y)

has a colour blind sister

(X^{C} X^{C})

and a normal brother (XY). What is genotype of father and mother.

Q. A couple with four children have two boys (i) Normal boy (ii) Colour-blind boy and none of two daughters is colorblind. Find out the correct genotype of parents.

	Mother	Father
(A)	$X^{C} X^{c}$	$X^{c} Y$
(B)	$X^{c} X^{c}$	$X^{c} Y$
(C)	$X^{C} X^{C}$	$X^{C} Y$
(D)	$X^{C} X^{c}$	$X^{C} Y$

Q. Colour blindness is a X linked recessive disorder in which the eye fails to distinguish between red and green colours. If a colour blind woman with genotype (

X^{C} X^{C}

) marries a normal visioned man (XY). Which among the following possibilities are true for their male children?

A woman having the genotype $X^{c} X$ where $X^{c}$ is the allele for colour blindness would be affected.

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