Define apomixis

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Define apomixis

Posted by Harshita Sharma 4 years, 10 months ago

CBSE > Class 12 > Biology

3 answers

Smriti Kashyap 4 years, 10 months ago

Apomixis is a mechanism to produce seeds without fertilization

1Thank You

Harshita Sharma 4 years, 10 months ago

Apomixis is a mechanism to produce seeds without fertilization.this mechanism produces clones , hence can be consider as a form of asexual reproduction that mimics sexual reproduction it does not involves meiosis and syngamy . It occur in some plant families like - asterraceae and grasses

0Thank You

Yogita Ingle 4 years, 10 months ago

Apomixis

Apomixis is a mechanism to produce seeds without fertilization. This mechanism produces clones, hence can be considered as a form of asexual reproduction.

Apomixis can occur in a number of ways, some of which are mentioned below:

Nucellar cells which are diploid & located outside the embryo sac continuously divide and enter inside embryo sac and later develop into embryos. In this way, multiple embryos can exist inside one ovule. This is termed as Polyembryony. It is seen commonly in Citrus, mango etc..

Sometimes, the egg cell is not formed as a result of reduction division, hence diploid. This diploid egg cell later directly develops into an embryo.