Right which allele combination represents a female who has a heterozygous sex-linked trait? xry xry xrxr xrxr

Ans.

A sex-linked trait is defined as character, determined by the genes present on sex chromosomes. In humans, females have two sex chromosomes (XX) and a heterozygous individual shows presence of different or alternative alleles for a trait.

Therefore, a female showing heterozygous sex-linked trait will show XRXr as one of its X chromosome carries wild type allele (R), while another X chromosome carries mutated (r) allele.

Thus, the correct answer is 'option). XRXr.'

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