Cell Biology Different Types Of Spermatogenesis, Oogenesis, and Fertilization

Cell Biology Different Types Of Spermatogenesis, Oogenesis, and Fertilization

The prevailing models presented in Figure 3 served because the foundation for developing brand new hypothesis models.

Spermatogenesis ( Figure 3A ): Spermatocytes bring about 4 spermatids, 2 of that have X sex chromosome in addition to other 2 spermatids have actually Y intercourse chromosome. Just 2 associated with the 4 spermatids take part in genetic recombination during meiosis we.

Oogenesis ( Figure 3B ): since the 4 gametes are not differentiated, the assumption is that any 2 gametes could form the secondary oocyte ensuing in an ovum with only 1 X chromosome.

Fertilization ( Figure 3C ): During fertilization, some of the 4 haploid spermatozoa can penetrate the ovum and fuse with all the X intercourse chromosome to make the zygote. The intercourse associated with the offspring is decided centered on if the spermatozoon using the X or Y chromosome unites with all the X intercourse chromosome when you look at the ovum to create the zygote; leading to feminine (XX) or(XY that is male offspring. 4,6

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