Question

Parthenogenesis is development of new individual from

• A. A single gamete without fertilization.
• B. Fertilization of female gamete with female gamete.
• C. Fertilization of male gamete with male gamete.
• D. Vegetative structure.

Answer 1

The correct option is A A single gamete without fertilization.

Parthenogenesis is the development of an embryo from an unfertilised egg or if a spermatozoa does penetrate the egg, there is no union of male and female pronuclei. It is a mode of asexual reproduction. On the basis of division, it is of two types apomictic parthenogenesis and automictic parthenogenesis. In apomictic parthenogenesis, the mature egg cells are produced by mitotic divisions, and these cells directly develop into embryos. The offspring produced are full clones of the mother.

In automictic parthenogenesis, the mother cell undergoes meiosis and produces haploid offspring which are the half-clone of the mother cell.

So, the correct answer is option A.