Which Factor is Responsible for Differentiating the Embryonic Gonads into Testes

Question

Which factor is responsible for differentiating the embryonic gonads into testes
A)the sex-determining region of the X chromosome
B)the sex-determining region of the Y chromosome
C)autosomal chromosomes
D)male gonadal-determining factor

Accepted Answer

The sex-determining region of the Y chromosome (SRY gene) is responsible for the differentiation of the embryonic gonads into testes. This gene codes for a protein that activates other genes and leads to the production of male hormones such as testosterone. Without the SRY gene, the gonads develop into ovaries.