I have doubt that what if human egg is fused with other animal's sperm?? Or vice versa
Dear Student,
In the process of fertilization of human egg, when the sperm are swimming up the female's reproductive tract, ions that female body secretes are absorbed into the sperm cells, causing internal changes that are referred to as capacitation. In humans, capacitation takes 5 to 6 hours and must be completed before the sperm can accomplish its next job, which is to penetrate the zona pellucida, or egg coat. The zona pellucida has proteins that are similar to the proteins used by the immune system, and these proteins make cross-species fertilization nearly impossible.
Once the sperm has successfully penetrated the zona pellucida, the acrosome reaction allows the sperm to fuse with the membrane of the egg so that the male's DNA can enter the egg cell. The acrosome reaction requires specific proteins that again prevent hybridization between species. So hybridization between humans and animals is quite impossible.
Regards
In the process of fertilization of human egg, when the sperm are swimming up the female's reproductive tract, ions that female body secretes are absorbed into the sperm cells, causing internal changes that are referred to as capacitation. In humans, capacitation takes 5 to 6 hours and must be completed before the sperm can accomplish its next job, which is to penetrate the zona pellucida, or egg coat. The zona pellucida has proteins that are similar to the proteins used by the immune system, and these proteins make cross-species fertilization nearly impossible.
Once the sperm has successfully penetrated the zona pellucida, the acrosome reaction allows the sperm to fuse with the membrane of the egg so that the male's DNA can enter the egg cell. The acrosome reaction requires specific proteins that again prevent hybridization between species. So hybridization between humans and animals is quite impossible.
Regards