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22. Variation And Genetics eLearn.Punjab
Y - Linked inheritance : Pattern of Y - linked inheritance is very peculiar. Maleness is a
Y - linked trait. Y - linked trait passes through Y - chromosome from father to son only.
Such traits cannot pass to daughters because they do not inherit Y - chromosome.
All sons of an affected father are affected by a Y - linked trait (Fig. 22.30). SRY’ gene
on Y chromosome determines maleness in man. It is male sex switch which triggers
developmental process towards maleness after 6 week pregnancy.
Fig 22.30 Y-linked inheritance in man
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