Which is genetically not possible?

(1) Hemophilic father transfers the hemophilic gene to his son

(2) Hemophiic father transfers the hemophilic gene to his daughter

(3) Carrier mother transfers the hemophilic gene to her son

(4) Carrier mother trannsfers the hemophilic gene to her daughter

(1) Hemophilia is a sex linked disease. It follows criss-cross inheritane in which fater does not pass the sex-linked allele of a trait to his son. The same is passed to the daughter, from where it reaches the grandson, i.e., diagynic. It is because the males have only one X-chromosome which is transferred to the female offspring. Only Y-chromosome of the father is transferred to the male offspring but this sex chromosome does not carry the allele for hemophilia. Mother passes the alleles of a sex-linked trait to both sones and daughters.

Difficulty Level:

  • 70%
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  • 9%
  • 10%