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Question
Explain following term:
Apomixis
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Solution
It is the phenomenon of the formation of the embryo(s) through the asexual reproduction method without the formation of gametes and the act of fertilization. Alternatively, it is unusual sexual reproduction where there is no meiosis and syngamy. The embryo develops in the ovule, and the ovule develops to form a seed. In apomixis, when a gametophyte organ or cell produces embryo-like structure without fertilization, it is called apogamy. Similarly, when a diploid sporophyte cell produces a diploid gametophyte without undergoing meiosis, it is called apospory, e.g. Orange, Mango.
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RELATED QUESTIONS
What is apomixis?
Explain various categories of apomixis.
Identify the CORRECT statements with respect to non-recurrent apomixis.
i. Plants produced by this method are generally sterile and do not reproduce sexually.
ii. In this, megaspore mother cell undergoes usual meiotic division and a haploid embryo sac is formed.
______ refers to the formation of seeds without fertilization.
The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilization is called ______.
A form of asexual reproduction that mimics sexual reproduction is ______.
Assertion: Apomictic embryos are genetically identical to the parent plant.
Reason: Apomixis is the production of seeds without fertilization.
Apospory is the direct formation of ______.
Which of the following defines apomixis correctly?
- Production of the embryo from an unfertilised egg.
- Production of seed without syngamy.
- Production of fruit without fertilisation.
- Production of seed without meiosis.
- Production of seed without mitosis.
Choose the correct options.
Haploid cells belong to ______.
