Choose the group of correct statements regarding sex-linked inheritance. A) Y-linked genes are inherited only in males. B) X-linked genes are inherited only in females. C) Colourblindness shows criss-cross inheritance. D) Haemophilia is Y-linked recessive disorder. E) The frequency of colourblind women is much less than colourblind men.

Step-by-step solution

Statement A is correct. Y-linked genes (holandric genes) are present only on the Y chromosome and are inherited exclusively from father to son, thus appearing only in males. Statement B is incorrect. X-linked genes are present on the X chromosome and are inherited by both males and females, as males have one X chromosome and females have two. Statement C is correct. Colourblindness is an X-linked recessive trait and exhibits criss-cross inheritance, meaning it is passed from an affected father to his grandson throu