Question

When gametes of species-A and species-B are placed in test tube, fertilization does not take place, which of the following is appropriate reason for it?

• A. Incompatibility of fertilizin and anti-fertilizin
• B. Formation of thick fertilization membrane around female gamete
• C. Lack of specific spermlysins
• D. No chance of capacitation in test tube

Answer 1

Answer: (A)

Incompatibility of fertilizin and anti-fertilizin

The sperm can fertilize an ovum only when they are able to secrete the chemical called hyaluronidase and possess a surface protein called antifertilizin. The ovum secretes a chemical named fertilizin. If there is an incompatibility in fertilizin and antifertilizin, fertilization will not happen.

So the correct option is "Incompatibility of fertilizin and antifertilizin".