Genes for colour blindness is carried by I. Abnormal development II. Father III. Mother IV. Autosome

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4.Principles of Inheritance and Variation

medium

Genes for colour blindness is carried by

$I.$ Abnormal development

$II.$ Father

$III.$ Mother

$IV.$ Autosomes

$I$ and $II$

$II$ and $III$

$III$ and $I$

$I$ and $IV$

Solution

Colour blindness is the sex-linked recessive disease in which the defective gene carried by the $X-$ chromosome. So, if a person is colourblind then it is due to the defective gene present in the father and mother.

Standard 12

Biology

A colourblind man has a colourblind sister but a normal brother than phenotype of its parents is

medium

If a colourblind man marries a woman who is homozygous for normal colour vision, the probability of their son being colourblind is

medium

(NEET-2016)

A colour blind son will born when

medium

Mendelian disorder may be of

medium

The daughter born to haemophilic father and normal mother could be

medium

(AIIMS-1992)

Genes for colour blindness is carried by $I.$ Abnormal development $II.$ Father $III.$ Mother $IV.$ Autosomes

Solution

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Genes for colour blindness is carried by

$I.$ Abnormal development

$II.$ Father

$III.$ Mother

$IV.$ Autosomes

If a colourblind man marries a woman who is homozygous for normal colour vision, the probability of their son being colourblind is