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Zona pellucida disintegrates just...

Zona pellucida disintegrates just

A

(a) after fertilization

B

(b) before fertilization

C

(c) before cleavage

D

(d) after completion of cleavage

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The correct Answer is:
D
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Explore conceptually related problems

Name the stage at which zona pellucida envelop disintegrates

Zona pellucida is secreted by

Statement-1: Upto morula stage, the cells divide without any increase in size. Statement-2: Zona pellucida remains intact till cleavage is complete.

Assertion: The cells divide without any increase in size up to morula stage. Reason: Zona pellucida remains intact till cleavage is complete.

Assertion : Zona pellucida is glycoproteinous in nature and dissolved during the event of implantation . Reason : The blastocyst , along with zona pellucida enters in decidua of uterus to protect itself from uterine acidic medium .

A : in morula stage the cells divide without any increase in size R : zona pellucida remains intact till cleavage is completed

Zona pellucida is synthesized by:-

A reaction fo granules content which harden the zona pellucida and ensures sure block to polyspermy is

When a neutron is disintegrated, it has :-

TRUEMEN BIOLOGY ENGLISH-HUMAN REPRODUCTION-Multiple Choice Questions
  1. What is true about cleavage in fertilized egg in humans?

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  2. Cleavage in mammals:

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  3. Zona pellucida disintegrates just

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  4. The portion of the endometrium that covers the embryo and located betw...

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  5. Human embryo will be called as a 'foetus' after:

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  6. Study the following: A. Testosterone influences the male secondary s...

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  7. In oogenesis, haploid egg is fertilized by sperm at which stage?

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  8. 2n=6 in a primary spermatocyte which is in metapahase of first meiotic...

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  9. Some important events in the human female reproductive cycle are given...

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  10. The 16 cells stage of the human embryo is

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  11. The principal tail piece of human sperm shows the microtubular arrange...

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  12. Eggs of placental mammals/human egg are expected to be

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  13. The eggs of some mammals have more yolk. They are

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  14. The primary egg membrane of mammalians egg is termed as -

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  15. After a sperm has penetrated an ovum, entry of further sperm is preven...

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  16. Fusion of male and female pronuclei of two conjugate Paramecium is kno...

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  17. Cleavage is a unique form of mitotic cell division in that

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  18. During cleavage, the cell division is very rapid. The daughter cells d...

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  19. Which one of the following is incorrect?

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  20. In embryo,cleavage brings about

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