The present models presented in Figure 3 served because the foundation for developing new hypothesis models.
Spermatogenesis ( Figure 3A ): Spermatocytes bring about 4 spermatids, 2 of that have X intercourse chromosome together with other 2 spermatids have actually Y intercourse chromosome. Just 2 of this 4 spermatids take part in genetic recombination during meiosis we.
Oogenesis ( Figure 3B ): since the 4 gametes aren’t differentiated, the assumption is that any 2 gametes can develop the oocyte that is secondary in a ovum with just one X chromosome.
Fertilization ( Figure 3C ): During fertilization, some of the 4 haploid spermatozoa can penetrate the ovum and fuse utilizing the X intercourse chromosome to create the zygote. The sex of this offspring is set predicated on if the spermatozoon using the X or Y chromosome unites because of the X intercourse chromosome within the ovum to make the zygote; causing feminine (XX) or male (XY) offspring. 4,6
The mobile biology types of spermatogenesis, oogenesis, and fertilization had been simulated after differentiating intercourse chromosomes as ancestral and parental into the model that is new Figure 4 ). They certainly were methodically analyzed theoretically, in addition to findings had been presented the following.
New Types Of Spermatogenesis, Oogenesis, and Fertilization
The various phases of spermatogenesis in meiosis we and II, including recombination, leads to the production of 4 haplo Figure 4A. Just the 2 spermatids which have taken component in hereditary recombination during meiosis we, that is, the ancestral ‘X’ chromosome and parental Y chromosome, can handle involved in the fertilization process. One other 2 spermatids, the ‘X’ and Y which have maybe perhaps not taken component in recombination, are going to be inactive and cannot be a part of the fertilization procedure.Подробнее