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The second maturation division of the mammalian ovum occurs |
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a) |
Shortly after ovulation before the ovum makes entry into the fallopian tube |
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b) |
Until after the ovum has been penetrated by a sperm |
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c) |
Until the nucleus of the sperm has fused with that of the ovum |
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d) |
In the Graafian follicle following the first maturation division |
|
The second maturation division of the mammalian ovum occurs |
|
|
a) |
Shortly after ovulation before the ovum makes entry into the fallopian tube |
|
b) |
Until after the ovum has been penetrated by a sperm |
|
c) |
Until the nucleus of the sperm has fused with that of the ovum |
|
d) |
In the Graafian follicle following the first maturation division |
(b)
In mammalian ovum during maturation phase, meiosis occurs. Nucleus shift towards animal pole and undergoes meiosis-I. After fertilization (penetration of sperm), the second meiotic division is completes with unequal cytoplasmic cleavage. This forms a large cell the ootid with essentially whole of the cytoplasm and a very small cell, the second polar body.