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Question
Describe the structure of sex-chromosomes.
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Solution
Structure of X and Y chromosomes
- X chromosomes are longer than Y chromosomes.
- X chromosome contains large amount of euchromatin and small amount of
heterochromatin, whereas the Y chromosome contains small amount of euchromatin
and large amount of heterochromatin. - Non-homologous region of X-chromosome contains more genes than that of nonhomologous region of Y chromosome.
- Non-homologous region of X-chromosome contains X-linked genes while nonhomologous region of Y chromosome contains Y-linked genes.
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