Which part of sperm enters in egg in human :
  • a)
    Complete sperm
  • b)
    Only head
  • c)
    Head & middle piece
  • d)
    Head + acrosome
Correct answer is option 'A'. Can you explain this answer?
Related Test: Test: Spermatogenesis

NEET Question

sperm
 is the male reproductive cell,
which
 possesses the haploid gamete
which
 when fused with the 
ovum
fertilized to form 
an
 embryo.

Raushani Praween
Jan 24, 2021
Answer should be only D option bcz it is given in class 12th NCERT.

When the plasma membrane of sperm head come in contact with the plasma membrane of oocyte The membrane of oocyte breaks down at the site of fusion This allows the sperm enters into the cytoplasm of oocyte (excluding the plasma membrane) As soon as sperm head and neck enters the oocyte, a calcium wave appears in the

cytoplasm of oocyte that makes oocyte membrane impermeable to other sperms.

Silent Action
3 weeks ago
The correct answer is "C" not a because acrosome is finished during pyration, tail breaks out side the egg.

Mohit Rajpoot
Jan 24, 2021
In case of human entire sperm enter into ovum.

Answer is b.. only head part enters in egg

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