
An apomixis is a form of
A. Vernalization
B. Parthenogenesis
C. Parthenocarpy
D. None of the above
Answer
337.5k+ views
Hint:
Before we proceed with the problem, we must know the definitions of Apomixis.
Apomixis is the production of seed without the process of fertilization. Botanist Hans Winkler is credited with coining the term.
The embryo is formed without the involvement of any gametes. It is a type of asexual reproduction that is more common in higher plants. Plants in the Rutaceae, Rosaceae, Gramineae, and Compositae families are apomictic. A few cases of apomixis have been observed in cereals such as wheat and maize.
Complete step by step answer:
Apomixis, also known as asexual seed formation, occurs when a plant gains the ability to perform the most important process by avoiding the most fundamental and basic aspects of sexual reproduction, meiosis, and fertilization.
Without the need for male fertilization, the resulting seed germinates a plant that develops exactly like a maternal clone.
Some species can only reproduce through apomixis. This is known as obligate apomixis. Some, on the other hand, can reproduce both sexually and asexually
This is known as facultative apomixis.
The embryo is formed directly from the egg without the need for fertilization. It can happen in two ways: first, if the egg is diploid (2n) rather than haploid (n), and second if the nucellus forms an embryo, in which certain cells in the nucellus undergo mitosis and enter embryo sacs to form numerous embryos that develop the ovule into a seed.
It is common in single-celled organisms, as well as some animals and plants. As a result, parthenogenesis is a type of apomixis.
Option ‘B’ is correct
Note:
The ovule becomes a seed without fertilization during apomixis, and the ovary becomes a fruit.
Parthenogenesis can also be used to reproduce organisms that lack sex chromosomes. However, monogamous or isogamous organisms cannot replicate in this manner.
The mother's clone is produced by apomictic parthenogenesis.
Natural and artificial parthenogenesis are the two main types of parthenogenesis.
Before we proceed with the problem, we must know the definitions of Apomixis.
Apomixis is the production of seed without the process of fertilization. Botanist Hans Winkler is credited with coining the term.
The embryo is formed without the involvement of any gametes. It is a type of asexual reproduction that is more common in higher plants. Plants in the Rutaceae, Rosaceae, Gramineae, and Compositae families are apomictic. A few cases of apomixis have been observed in cereals such as wheat and maize.
Complete step by step answer:
Apomixis, also known as asexual seed formation, occurs when a plant gains the ability to perform the most important process by avoiding the most fundamental and basic aspects of sexual reproduction, meiosis, and fertilization.
Without the need for male fertilization, the resulting seed germinates a plant that develops exactly like a maternal clone.
Some species can only reproduce through apomixis. This is known as obligate apomixis. Some, on the other hand, can reproduce both sexually and asexually
This is known as facultative apomixis.
The embryo is formed directly from the egg without the need for fertilization. It can happen in two ways: first, if the egg is diploid (2n) rather than haploid (n), and second if the nucellus forms an embryo, in which certain cells in the nucellus undergo mitosis and enter embryo sacs to form numerous embryos that develop the ovule into a seed.
It is common in single-celled organisms, as well as some animals and plants. As a result, parthenogenesis is a type of apomixis.
Option ‘B’ is correct
Note:
The ovule becomes a seed without fertilization during apomixis, and the ovary becomes a fruit.
Parthenogenesis can also be used to reproduce organisms that lack sex chromosomes. However, monogamous or isogamous organisms cannot replicate in this manner.
The mother's clone is produced by apomictic parthenogenesis.
Natural and artificial parthenogenesis are the two main types of parthenogenesis.
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