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Sex influenced genes will not occur in ________________

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Sex influenced genes will not occur in ________________

(a) Homologous autosome

(b) Homologous part of sex chromosome

(c) Short arm of human Y chromosome

(d) On autosomes of male

This question was posed to me in exam.

Enquiry is from Sex Influenced Traits and Sex Limited Traits topic in portion Chromosomes and Sex Determination of Cytogenetics

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The correct answer is (c) Short arm of human Y chromosome

The explanation: Short arm of human Y chromosome is not homologous to X chromosome. Thus, genes there will show Y linkage. Sex influenced genes don’t show linkage and are not exclusive to X or Y chromosomes, so it will not be present there.

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