Two dominant genes determine black colouring of teeth; one of them is located in an autosome (A and a), and the other in X-chromosome (X and X). A daughter and a son with normal teeth colour were born to the parents with dark teeth. It is known that the X-linked gene determines the mother's dark teeth, while the autosomal gene determines the father's dark teeth. Whats is the genotypes of the son? Select one: O Aa X^Xa aaXy O AaXy O aaXXa O AA XAXA O aaXAxa O Aa X^Y aa Xy O aa X^XA O AA X Y Two dominant genes determine black colouring of teeth; one of them is located in an autosome (A and a), and the other in X-chromosome( X and X). A daughter and a son with normal teeth colour were born to the parents with dark teeth. It is known that the X-linked gene determines the mother's dark teeth, while the autosomal gene determines the father's dark teeth. Whats is the genotype of the mother? Select one: O Aa XY O AaXy O AAXAXA O aaXy O AaXAya O aa XAXA aaXY aa Xaxa O AA X Y O aax^xa