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Fertilization in Humans

All copulatio...

Question

All copulations do not lead to fertilization and pregnancy because?

A

All mating does not result in transport of sperm and ovum simultaneously at ampulla

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B

Survival duration of both sperm and ovum is same

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C

Number of sperms and ovum varies

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D

None of these

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Solution

The correct option is B All mating does not result in transport of sperm and ovum simultaneously at ampulla
All copulation does not lead to fertilization and pregnancy because all mating does not result in transport of sperm and ovum simultaneously at ampulla.
The ovum has to be present in the ampulla of fallopian tube, so when the sperm reaches, it fertilizes and causes pregnancy.
It is very important for sperm and ovum to be present at the same time in ampulla, to cause fertilization and pregnancy.
Correct Answer -[A] option.

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Q. Assertion :All copulations do not lead to the fertilisation and pregnancy. Reason: Fertilisation can occur only if the ovum and sperms are transported simultaneously to the ampullary - isthmic junction.

Q. Assertion (A): All copulations cannot lead to fertilisation and pregnancy
Reason (R): Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region

Q. Choose the correct option with respect to the assertion and reason given.
Assertion (A): Not all copulations lead to fertilisation and pregnancy in human beings.
Reason (R): Fertilisation can only occur if the ovum and sperms are transported simultaneously to the ampullary region of the fallopian tube.

Q. Choose the correct option with respect to the assertion [A] and reason [R] given.
Assertion(A): Not all copulations lead to fertilisation and pregnancy.
Reason (R): One reason can be that sperms and ovum are not transported simultaneously to the region where fertilisation occurs.

Q. Fertilization is the fusion of sperm and ovum.

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