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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Females make primary oocytes everyday
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False, they make them every month
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False, they make them every year
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False, they are born with all the primary oocytes they’ll ever have
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True
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Explanation:
Detailed explanation-1: -Many of the primary oocytes degenerate before birth, but even with this decline, the two ovaries together contain approximately 700, 000 oocytes at birth. This is the lifetime supply, and no more will develop.
Detailed explanation-2: -Oogenesis begins before birth but is not finished until after puberty. A mature egg forms only if a secondary oocyte is fertilized by a sperm. Oogenesis begins long before birth when an oogonium with the diploid number of chromosomes undergoes mitosis. It produces a diploid daughter cell called a primary oocyte.
Detailed explanation-3: -At the moment of birth, females have about two million primary oocytes in their ovaries.
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