Question

A somatic cell in a human male contains:

• A. No gene on the sex chromosome
• B. Genes only on sex chromosomes
• C. Two genes for every sex-linked character
• D. Only one sex-linked gene for each character

Answer 1

Answer: (D)

Human males contain 44 autosomes and a pair of sex chromosomes having one X and one Y chromosome. Genes located on the X and Y chromosomes are called sex-linked genes. Genes present on the X chromosome are called X linked genes and genes present on the Y chromosome are called Y linked genes. Male is hemizygous for both X linked and Y linked genes.