A rare bird was spotted in the yard of couple's, Jeff and Shirley, house in Pennsylvania. This bird is a gynandromorph, which means that it is half male and half female (The Macquarie Dictionary). This rare bird is a cardinal with its right side the colour of the male, red, and its left side the colour of the female, brownish. Birds chromosomes are made up of two chromosomes, W and Z. A female bird will have both chromosomes, and a male bird will have two Z chromosomes. When a female's egg has two nuclei, one with the W chromosome and one with the chromosome and that egg is fertilized by a…