Alex Quinn, a Ph.D. prospect during the Institute for used Ecology during the University of Canberra in Australia, types this quandary down for us.

Sex-determining mechanisms in reptiles are broadly divided in to two primary groups: genotypic intercourse dedication (GSD) and temperature-dependent intercourse dedication (TSD).

Types into the group that is genotypic like animals and wild birds, have sexual intercourse chromosomes, which in reptiles are available in two major kinds. Numerous species—such as a few types of turtle and lizards, just like the iguana—have that is green and Y intercourse chromosomes (again, like mammals), with females being «homogametic,» this is certainly, having two identical X chromosomes. Men, on the other hand, are «heterogametic,» with one X chromosome and one Y chromosome. Other reptiles governed by GSD have system, comparable to 1 present in wild wild birds, with Z and W intercourse chromosomes. Continue reading →