Question

The origin of embryo from either synergids or antipodal cells of the embryosac is called

• A. Apospory
• B. Apogamy
• C. Parthenogenesis
• D. Adventive embryony

Answer 1

The correct option is B Apogamy

Apomixis refers to the development of seed without sexual fusion (fertilization). In apomixis embryo develops without fertilization. There are four types of apomixis:

1. Parthenogenesis - refers to development of embryo from the egg cell without fertilization.

2. Apogamy - The origin of embryo from either synergids or antipodal cells of the embryosac is called as apogamy.

Apospory - In apospory, first diploid cell of ovule lying outside the embryosac develops into another embryosac without reduction. The embryo then develops directly from the diploid egg cell without fertilization.

4. Adventive embryony - The development of embryo directly from the diploid cells of ovule lying outside the embryosac belonging to either nucellus or integuments is referred to as adventive embryony.