Apomixis and Polyembryony

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Apomixis and Polyembryony: Overview

This topic consists of various concepts like Apomixis,Polyembryony,, etc.

Important Questions on Apomixis and Polyembryony

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If you squeeze a seed of orange you might observe many embryos of different sizes. Which of the following is the reason?

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The phenomenon of asexual reproduction that mimics sexual reproduction by formation of seed without fertilization is called

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Fertilization is essential for production of seed, but in some angiosperms seeds develop without fertilization. This process is known as:

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Asexual reproduction mode of seed formation is called:

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I. A single plant can't show both apomixis and polyembryony.

II. Presence of multiple embryos in multiple ovules is called polyembryony.

III. Species of grass family can produce seeds without fertilisation.

Find the correct options with respect to above lines:

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Assertion: Apomictics do not show segregation of characters in their progeny and therefore have huge potential in hybrid seed industry.

Reason: Apomictic seeds are produced without fertilization.

The correct option among the following is:

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The development of gametophyte from the vegetative part of the sporophyte without the intervention of spores is called:
Or
The formation of gametophyte from the sporophyte (without meiosis) is called:

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Statement - 'X': Apomixis is seen in a few flowering plants such as some species of Asteraceae and grasses.
Statement - 'Y': Apomixis is a form of asexual reproduction that mimics sexual reproduction.

Statement - 'Z': In some species of apomictic seeds, the diploid egg cell is formed without reduction division.
Choose the correct option.

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Non-sexual method of reproduction is:

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Give some examples of polyembryony.

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What are the roles of apomixis?

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During fertilisation in plants the male and female gametes unite, triggering the process of cell division followed by seed formation. A gene BBM1, expressed only in the male gamete, is responsible for eliciting rapid cell division. A researcher overexpressed the BBM1 gene in the female gamete that resulted in the multiplication of the female gamete into an embryo and then the seed. The plants obtained from these seeds were genetically identical to the parent. This phenomenon is commonly seen in a few select plants naturally, and is known as

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Listed below are different plant reproductive strategies.

I. Parthenocarpy

II. Syngamy

III. Apomixis

IV. Polyembryony

Which of them can give rise to a clonal progeny having the same genotype as that of the mother plant?

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Polyembryony is reported in
(i) Citrus
(ii) Mango
(iii) Gossypium
Correct names are        .

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Which of the following process helps to produce hybrid seeds?