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प्रश्न
The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilization is called ______.
विकल्प
parthenocarpy
apomixis
vegetative propagation
sexual reproduction
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उत्तर
The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilization is called apomixis.
Explanation:
Apomixis is when parts of the sexual apparatus in some plants make embryos without fertilization. This means that sexual reproduction is replaced by an asexual process. This allows embryo development without meiosis or syngamy, preserving desirable traits in plants indefinitely. It is observed in some species of Asteraceae and grasses and is important in horticulture and agriculture for maintaining hybrid vigor.
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संबंधित प्रश्न
What is apomixis?
Explain various categories of apomixis.
In ______a diploid sporophyte cell produces a diploid gametophyte without undergoing meiosis.
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.
A form of asexual reproduction that mimics sexual reproduction is ______.
Are pollination and fertilization necessary in apomixis? Give reasons.
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.
Explain following term:
Apomixis
What is the importance of apomixis?
Who coined the term Apomixis?
What is the key bypass in Apomixis?
In recurrent apomixis, the nuclei of the embryo sac are of which ploidy?
Which two sub-categories exist under Agamospermy in recurrent apomixis?
What happens to the megaspore mother cell (MMC) in Apospory?
In Somatic Apospory, which cell develops into a diploid \[2n\] embryo sac?
What is another name for Apospory?
Why is Adventive Embryony also called Sporophytic Budding?
Adventive embryos developing alongside the normal zygotic embryo give rise to what?
Non-recurrent apomixis is useful in which studies?
Scientists are trying to introduce apomixis into which crops for better food production?
What is Apogamy?
