MCQ MAHE 2000 Medicine Answer 04
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The incidence of the trait is much higher in males than in females, heterozygous females are usually unaffected. The gene (and trait) is usually transmitted from an affected male to his grandsons through his daughters; the grandsons have a 50% chance of inheriting the trait. Males never transmit the disease directly to their sons, so that affected males in a kindred are related to each other through females.
Some common X linked recessive conditions include red-green colorblindness, hemophilia (bleeders), Duchenne muscular dystrophy and Lesch-Nyhan disorder in which the affected individuals tend to have movement problem and to mutilate themselves.
Tags: MCQ, Medicine, Genetics, X-linked Recessive
Category: MAHE 2000 MCQs
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