The prevailing models presented in Figure 3 served given that foundation for developing brand new theory models.
Spermatogenesis ( Figure 3A ): Spermatocytes bring about 4 spermatids, 2 of which may have X intercourse chromosome therefore the other 2 spermatids have actually Y intercourse chromosome. Just 2 regarding the 4 spermatids be involved in genetic recombination during meiosis we.
Oogenesis ( Figure 3B ): while the 4 gametes aren’t differentiated, the assumption is that any 2 gametes can develop the additional oocyte resulting in a ovum with just one X chromosome. 繼續閱讀