Chapter 7, Problem 3CS

Summary Introduction

To determine:

The type of mutation that might be involved if a female dog is identified with a normal-sized XY chromosome pair.

Introduction:

A dog breeder came to know that one of her male dog has developed abnormal genitalia. Once she visited a veterinary clinic she learns that the dog’s karyotype lacks a Y chromosome. Instead of the Y chromosome, it possesses an XX chromosome pair, in which one X chromosome is slightly larger than normal. The veterinarian reveals her that in other breeds, some female dog shows an XY chromosome pair, in which the Y chromosome being shorter than usual.