But in many other animal groups, the genetic mechanism of sex determination developed quite fast, and the differences between sex chromosomes are difficult to observe. Even sister species may very different sex determination systems. Last 20 years, how and why the genetic mechanisms for such an ancient developmental disabilities distinction remained a mystery. The thousands of closely related cichlid fishes in the lakes of East Africa turn out to be an excellent model for understanding, have to be developed as the mechanisms of sex determination.. In almost all mammals, the gene that is the sex of the offspring is determined on the Y chromosome, which is much smaller than the X chromosome.
Plaid Cymru Schatten Gesundheitsminister Rhodri Glyn Thomas AM WIRD se 418 000Cymru – Party of Wales movementdeplores the decision by Local Health Boards and unacceptable administrative costs and establish believe that these resources would be be better spent on NHS hospital treatment. Continue reading “In almost all mammals.”