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Why is the *** linked disease …

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Why is the *** linked disease only be heridited through X chromosomed.....or if it is so then why only males get the disease and not female althogh female have two X chromosomes

Posted by Drishty Kamboj 4 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Preeti Kannaujiya 4 years, 8 months ago

This disease happens in a male only when the mother is a carrier with chromosome (xx^h) and father is haemophilic (x^h y). So if you do the cross of these two chromosomes you'll get four genotypes- (1)xx^h(carrier) (2)xy(unaffected male) (3)x^h x^h(affected female) (4)x^hy(haemophilic). That is, (1) this is linked to only X-chromosome. (2)there is 25% chance of an affected female too.

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