A dig breeder discovers two of her puppies have abnormal genitalia. Chromosomal tests (cytogenetic analyses ) indicate that the male dog’s karyotype lacks a Y chromosome, but instead has an XX chromosome pair, with one of the X-chromosome slightly larger than usual. Whereas, the female dog’s karyotype reveals an XY chromosome pair, with Y-chromosome being slightly shorter than normal ( being mammals, male dogs are normally XY and females are XX).

a) Can you offer a chromosomal explanation of these two cases considering what you know about SRY gene?