Question

Parthenogenesis is formation of

• A. Embryo without fertilization
• B. Embryo from pollen sac
• C. Sporophytic plantlet from gametophyte
• D. Fruit without fertilization

Answer 1

The correct option is A Embryo without fertilization

Parthenogenesis is the development of an embryo from an unfertilised egg or if a spermatozoon 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 offsprings 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.