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Why do all copulations not lead to fe...

Why do all copulations not lead to fertilisation and pregnancy ? The root cause is ______

A

Due to numerous sperms and one ovum

B

Due to less progesterone

C

Ovum and sperms are not transperted simultaneously to the ampullary - isthmic junction

D

Due to non- formation of corpus luteum

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The correct Answer is:
C
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A : All copulations do not lead to fertilisation and pregnancy . R : Fertillsation can occur if the ovum and sperms are transported simultaneously to the ampullary - isthmic junction

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

Assertion: All copulations cannot lead to fertilisation and pregnancy. Reason: Fertilisation can only occur if the ovum and sperms are transported simulaneously to the ampullary region.

Read the following text and answer the following questions on the basis of the same: During sexual reproduction, the male inserts the sperm into the female reproductive tract, and sperm receive by the ovary and after that sperm fuse with the egg (ovum) in the ampullary region, this process is called fertilization, haploid nucleus of sperm fuse with that of ovum to form Diploid zygote. Assertion (A): All copulations do not lead to the fertilisation and pregnancy. Reason (R): Fertilisation can occur only if the ovum and sperms are transported simultaneously to the ampulllary-isthmic junction.

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AAKASH INSTITUTE-HUMAN REPRODUCTION-Assignment ( Section - B ) (Objective Type Question )
  1. Which one of the following is the incorrect match of the events occu...

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  2. Identify the hormones that are secreted in large amount prior to...

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  3. Why do all copulations not lead to fertilisation and pregnancy ? T...

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  4. What induces the completion of the meiotic division of the second...

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  5. Following the diagram of an ovum surrounded by few sperms Which...

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  6. Identify the stages A and B , and what is the correct labelling o...

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  7. The first sing of the second month foetus may noticed by listening ...

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  8. In human beings, pregnacy lasts for 9month . The gestation period of d...

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  9. which of the following decidua layer forms a partition between develop...

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  10. which of the following in not a correct statement about umbilical cord...

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  11. Sometimes the labor pains are less and uterine contraction have to b...

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  12. which of the following is not the function of Sertoli cells (sustentac...

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  13. If both ovaris are removed from pregnant human femle in first trimeste...

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  14. Decidua which lakes part in the formation of maternal protion of the p...

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  15. In which type of placnta minimum number of barrier is / are present be...

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  16. Blood flowing in umbilical cord of mammalian embryo is

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  17. Epiboly is the process of

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  18. which of the followin enzyme helps sperm to penetrate zone pellucida ?

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  19. Inhibition of uterine contraction casses and the bleeding and cramps o...

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  20. Which centriole of sperm is required for first cleavage?

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