Principle of Inheritance and VariationHard
Question
Of a normal couple, half the sons are haemophilic which half the saughters are carriers. The gene is located on
Options
A.X- chromosome of father
B.Y- chromosome of father
C.one X- chromosome of mother
D.obth the X- chromosome of mother
Solution
Haemophilic is a sex-linked disease. Gene of this disease is located on X-chromosome. In the given case where half the sons are haemophilic and half the daughters are carriers this is pos sible only when the gene responsible for haemophilia is located on one X-chromosome of mother.
Daughters :
50% = Carrier, 50% = Normal
Sons :
50 % = Haemophilic , 50% = Normal
Daughters :
50% = Carrier, 50% = Normal
Sons :
50 % = Haemophilic , 50% = Normal
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