Principles of Inheritance and Variation. — Bio Zoology STD 12 — Question
Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyPrinciples of Inheritance and Variation.2 Marks
Question
Explain the inheritance pattern of Y-linked genes with example.
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Answer
Genes in the non-homologous region of the Y-chromosome are inherited directly from male to male. In humans, the Y-linked or holandric genes for hypertrichosis (excessive development of hairs on pinna of the ear) are transmitted directly from father to son, because males inherit the Y chromosome from the father. Female inherits only X chromosome from the father and are not affected.
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