W chromosome

From Biology-Online Dictionary | Biology-Online Dictionary

w chromosome

(Science: genetics) A sex chromosome found in all birds and certain other animals where the female is the heterogametic sex. The W chromosome causes the individual to become female in bird species. It is part of the WZ set of sex chromosomes, where the female has one W chromosome and one z chromosome, and the male has two Z chromosomes. The equivalent of the mammal Y chromosome that is found in birds, like the comparison of X and Z chromosomes respectively.