Question

Recurrent apomixis involves
A. Generative apospory
B. Somatic apospory
C. Both (A) and (B)
D. None of the above

Answer 1

Apomixis is defined as type of asexual reproduction which occurs without the process of fertilization. It is more common in plants.

_Complete answer: _Apomixis is the process of replacement of sexual reproduction by asexual reproduction and in more common in plants. In this process, the plant develops or produces seeds without involvement and union of the male and female gametes. In the process of apomixes, the asexual reproduction does not involves fertilization. The offspring arising from the process of apomixis are generally perfect copies or clones of the parent. The offspring plants that are produced are fertile in nature. Apomixis are more common in plants and the gametophyte cells are capable of undergoing the process of apomixis.
Apomixis are three types which are non-recurrent, recurrent and adventive and vegetative apomixis.
Recurrent apomixis is the process in which the megagametophyte contains the exact number of chromosomes as that of the mother chromosomes. This condition arises due to the incomplete meiosis and arises either from archesporial cells or even from some other parts of the nucleus.
Recurrent apomixis are of two types: generative apospory and somatic apospory.
Generative apospory is also called as diplospory. In generative apospory, the megagametophytes arise from a cell of archesporium. Somatic apospory or apospory is the process of production of megagametophyte from some other cells or mostly, somatic cells of the nucleus.
Hence, option C. Both (A) and (B) is correct.

Additional information:
Apomixis has been reported to occur in nearly 33 families of flowering plants. The development of apomixis can be the result of maintaining purity of gametes as the genes of offspring are the exact copy of the parent. It has been said to evolve from sexual relatives.

Note: In the process of recurrent apomixis, the embryo sac develops from the mother cell and sometimes from some other diploid cells without undergoing the process of fertilization. The seed or egg has the same number of chromosomes as that of the mother cell.