Question

Which of the following characteristics differentiates a sperm from egg?

• A. Cytoplasm is more abundant in sperm than in egg.
• B. Accessory membranes are absent in sperm but present in egg.
• C. Nucleus is clear in sperm and very compact in egg.
• D. Mitochondria form a sheath in egg and diffused in sperm.

Answer 1

The correct option is B Accessory membranes are absent in sperm but present in egg.

A. Sperms have scanty cytoplasm while egg has large amount of cytoplasm.

B. Sperm has no protective coats while egg is enclosed by 2 protective coats- internal zona pellucida and external corona radiata.

C. Nucleus is very compact in sperm while egg's nucleus is large and called germinal vesicle.

D. Mitochondria forms a spiral in the middle piece of sperm while it is scattered in the ooplasm of egg.

So, the correct answer is 'Accessory membranes are absent in sperm but present in egg'