EMBRYOLOGY
FEMALE SEX GLAND OVARIES ÖOGENESIS AND MENSTRUAL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2
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3
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it depends
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Detailed explanation-1: –For the nearly 5, 000 sperm that make it into the utero-tubal junction, around 1, 000 of these reach the inside of the Fallopian tube.-For the 1, 000 sperm entering the tube, only around 200 actually reach the egg.-In the end, only 1 lucky sperm out of this group of 200 actually penetrates and fertilizes the egg!
Detailed explanation-2: -It takes just one sperm to fertilize a woman’s egg. Keep in mind, though, for each sperm that reaches the egg, there are millions that don’t. On average, each time men ejaculate they release nearly 100 million sperm.
Detailed explanation-3: -If more than one sperm fuses-a condition called polyspermy-multipolar or extra mitotic spindles are formed, resulting in faulty segregation of chromosomes during cell division; nondiploid cells are produced, and development usually stops. Two mechanisms can operate to ensure that only one sperm fertilizes the egg.