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Human Reproduction

Question

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The second maturation division of the mammalian ovum occurs

shortly after ovulation before the ovum makes entry into the fallopian tube

until after the ovum has penetrated by a sperm

until the nucleus of the sperm has fused with that of the ovum

in the Graafian follicle following the first maturation division

Solution

B.

until after the ovum has penetrated by a sperm

In mammalian ovum during maturation phase, meiosis occurs, nucleus shifts towards the animal pole and undergoes meiosis-I. After fertilisation (penetration of sperm), the second meiotic division is completed with unequal cytoplasmic cleavage. This forms a large cell the ootid with the essentially whole of the cytoplasm and a very small cell, the second polar body.

Some More Questions From Human Reproduction Chapter

Which of the following shows hermaphroditism and self fertilization ?

The chromosone in primary spermatocyte are :

The male reproductive system is located in the body, in the :

Sertoli cells provide :

The middle piece of human sperm contains :

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

Scrotum communicates with abdominal cavity through :

How many spermatozoa or sperms are present in human ejaculate ?

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