Apomixis is

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1.Sexual Reproduction in Flowering Plants

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Apomixis is

formation of seeds by fusion of gametes

formation of seeds without syngamy and meiosis.

formation of seeds with syngamy but no meiosis.

None of the above

(AIIMS-2007)

Solution

In plants, normal sexual reproduction includes meiosis and fertilization . It is called amphimixis. But in some plants abnormal sexual reproduction called apomixis has been observed. Apomixis includes abnormal sexual reproduction in which egg or other cells like synergids and antipodals develop into embryo without fertilization and meiosis. The term apomixis was given be Winkler $(1908)$ eg. Citrus, Rannunculus.

Standard 12

Biology

How many sentences are correct?

– To produce seeds without fertilisation is called apomixis

– Occurance of more than one embryo in a seed is referred to as polyembryony

– The pollen grains represent the male gametophytes.

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Are pollination and fertilisation necessary in apomixis? Give reasons.

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What is apomixis and what is its importance?

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In case of polyembryony, if an embryo develops from the synergid and another from the nucellus which is haploid and which is diploid ?

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$A$ : Hybrid seeds have to be produced every year because seeds collected from hybrid plants, if sown
subsequently, do not maintain hybrid characters.
$R$ : Hybrid seeds show segregation of traits.

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Apomixis is

Solution

Similar Questions

How many sentences are correct? – To produce seeds without fertilisation is called apomixis – Occurance of more than one embryo in a seed is referred to as polyembryony – The pollen grains represent the male gametophytes.

Are pollination and fertilisation necessary in apomixis? Give reasons.

What is apomixis and what is its importance?

In case of polyembryony, if an embryo develops from the synergid and another from the nucellus which is haploid and which is diploid ?

$A$ : Hybrid seeds have to be produced every year because seeds collected from hybrid plants, if sown subsequently, do not maintain hybrid characters. $R$ : Hybrid seeds show segregation of traits.

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How many sentences are correct?

– To produce seeds without fertilisation is called apomixis

– Occurance of more than one embryo in a seed is referred to as polyembryony

– The pollen grains represent the male gametophytes.

$A$ : Hybrid seeds have to be produced every year because seeds collected from hybrid plants, if sown
subsequently, do not maintain hybrid characters.
$R$ : Hybrid seeds show segregation of traits.