if only one sperm penetrates into the zona pellucida of the ovum n other sperm which try to bind to the ovum are prevented from binding by the cortical granules secreted by exocytosis than what happens in Sextuplet? please give a detailed explanation.
In a normal reproductive process, only one sperm is able to fertilize the ovum. This occurs because once one sperm has entered the ovum's zona pellucida, a protective layer surrounding the ovum, the zona pellucida undergoes changes that prevent any additional sperm from binding to it.
Now, let's discuss what happens in the context of sextuplets. Sextuplets refer to a pregnancy where six embryos develop simultaneously. In order for sextuplets to occur, six separate ova would need to be released from the ovary and be fertilized by six individual sperm.
However, the scenario you described earlier, where only one sperm is able to penetrate the zona pellucida and bind to the ovum due to the action of cortical granules, presents a challenge for sextuplets to naturally occur. If cortical granules are effectively preventing the binding of additional sperm to the ovum, it is highly improbable for the ovum to be fertilized by multiple sperm.
In other words, the cortical granules' action would most likely inhibit the fertilization of multiple sperm, thereby preventing the development of sextuplets in this particular scenario.