The sex chromosomes in birds are designated Z and W, and the male is the homomorphic sex (ZZ) and the female heteromorphic (ZW). In most avian species the Z
Sex determination results in the development of individuals with characteristics that allow them to be identified as males, females, or in some cases, hermaphrodites.
In some birds, butterflies, moths, and other organisms, the female is the heterogametic sex. These females are designated ZW, while the males are ZZ.
Relationships between Vertebrate ZW and XY Sex Chromosome Systems. Tariq Temperature sex determination has been unequivocally established in at least one
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most sexual organisms have two sexes.
The ZW sex-determination system is found in birds, some reptiles, and some insects and other organisms.
Sex determination: insights from the chicken ZW sex chromosome Sex determination must be a process of great antiquity in
The XY and ZW Systems of Sex Determination. Birds, butterflies, and snakes take everything we know about sex at the chromosomal level and stand it on its head.