If a person has a total gender reassignment - sex change no matter how extreme the operation goes with hormone injections etc; on a DNA level, the sex of that person is absolute? No amount of surgery, hormone injections or anything else will change someone's DNA from a man's to a woman's or vice versa. As you know, for humans, sex is determined by the presence of a Y chromosome -- humans with an X and a Y chromosome are male and those with two X chromosomes are female.
They are separated in two local forms that share a common origin in hybridization between the other two forms West Japan and Kanto with male heterogametic sex determination and homomorphic sex chromosomes.
This page has been archived and is no longer updated. By the s, scientists had established methods for staining chromosomes so that they could be easily visualized using a simple light microscope. With this staining method, scientists were able to observe cell division and to identify the steps that occurred during both mitosis and meiosis Figure 1.
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