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Consider the following structure -
perisperm,seed coat, funicle,cotyledon,aleurone layer,endosperm,epicotyls,plumule,hypocotyls,radicle, hilum,integument
How many are genetically identical to zygote
- a)four
- b)five
- c)six
- d)seven
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Consider the following structure -perisperm,seed coat, funicle,cotyled...
Explanation- cotyledon, epicotyls, plumule, hypocotyls and radicle are genetically identical to zyggote
This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
Consider the following structure -perisperm,seed coat, funicle,cotyled...
Genetically Identical Structures to Zygote
To determine the number of structures that are genetically identical to the zygote, let's analyze each structure and its origin.
1. Perisperm: The perisperm is a nutritive tissue that surrounds the embryo in some seeds. It is derived from the nucellus and therefore not genetically identical to the zygote.
2. Seed Coat: The seed coat is the protective outer covering of the seed. It is formed by the integuments, which are derived from the diploid maternal tissue. Therefore, the seed coat is not genetically identical to the zygote.
3. Funicle: The funicle is the stalk that attaches the seed to the placenta in the ovary. It is derived from the maternal tissue and is not genetically identical to the zygote.
4. Cotyledon: The cotyledon is the embryonic leaf in the seed. It is derived from the zygote and is genetically identical to it.
5. Aleurone Layer: The aleurone layer is the outermost layer of the endosperm. It is derived from the nucellus and is not genetically identical to the zygote.
6. Endosperm: The endosperm is a nutritive tissue that surrounds the embryo in most angiosperm seeds. It is derived from the fusion of the polar nuclei with a second male gamete, forming a triploid nucleus. Therefore, the endosperm is not genetically identical to the zygote.
7. Epicotyls: The epicotyl is the portion of the embryo above the point of attachment of the cotyledon(s) and below the plumule. It is derived from the zygote and is genetically identical to it.
8. Plumule: The plumule is the embryonic shoot in the seed. It is derived from the zygote and is genetically identical to it.
9. Hypocotyls: The hypocotyl is the portion of the embryo below the point of attachment of the cotyledon(s) and above the radicle. It is derived from the zygote and is genetically identical to it.
10. Radicle: The radicle is the embryonic root in the seed. It is derived from the zygote and is genetically identical to it.
11. Hilum: The hilum is the scar on the seed coat where it was attached to the funicle. It is derived from the maternal tissue and is not genetically identical to the zygote.
12. Integument: The integument is the outer covering of the ovule, which becomes the seed coat. It is derived from the diploid maternal tissue and is not genetically identical to the zygote.
Genetically Identical Structures:
- Cotyledon
- Epicotyls
- Plumule
- Hypocotyls
- Radicle
Therefore, there are five structures (cotyledon, epicotyls, plumule, hypocotyls, and radicle) that are genetically identical to the zygote. The correct answer is option 'B' (five).
To determine the number of structures that are genetically identical to the zygote, let's analyze each structure and its origin.
1. Perisperm: The perisperm is a nutritive tissue that surrounds the embryo in some seeds. It is derived from the nucellus and therefore not genetically identical to the zygote.
2. Seed Coat: The seed coat is the protective outer covering of the seed. It is formed by the integuments, which are derived from the diploid maternal tissue. Therefore, the seed coat is not genetically identical to the zygote.
3. Funicle: The funicle is the stalk that attaches the seed to the placenta in the ovary. It is derived from the maternal tissue and is not genetically identical to the zygote.
4. Cotyledon: The cotyledon is the embryonic leaf in the seed. It is derived from the zygote and is genetically identical to it.
5. Aleurone Layer: The aleurone layer is the outermost layer of the endosperm. It is derived from the nucellus and is not genetically identical to the zygote.
6. Endosperm: The endosperm is a nutritive tissue that surrounds the embryo in most angiosperm seeds. It is derived from the fusion of the polar nuclei with a second male gamete, forming a triploid nucleus. Therefore, the endosperm is not genetically identical to the zygote.
7. Epicotyls: The epicotyl is the portion of the embryo above the point of attachment of the cotyledon(s) and below the plumule. It is derived from the zygote and is genetically identical to it.
8. Plumule: The plumule is the embryonic shoot in the seed. It is derived from the zygote and is genetically identical to it.
9. Hypocotyls: The hypocotyl is the portion of the embryo below the point of attachment of the cotyledon(s) and above the radicle. It is derived from the zygote and is genetically identical to it.
10. Radicle: The radicle is the embryonic root in the seed. It is derived from the zygote and is genetically identical to it.
11. Hilum: The hilum is the scar on the seed coat where it was attached to the funicle. It is derived from the maternal tissue and is not genetically identical to the zygote.
12. Integument: The integument is the outer covering of the ovule, which becomes the seed coat. It is derived from the diploid maternal tissue and is not genetically identical to the zygote.
Genetically Identical Structures:
- Cotyledon
- Epicotyls
- Plumule
- Hypocotyls
- Radicle
Therefore, there are five structures (cotyledon, epicotyls, plumule, hypocotyls, and radicle) that are genetically identical to the zygote. The correct answer is option 'B' (five).
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Consider the following structure -perisperm,seed coat, funicle,cotyledon,aleurone layer,endosperm,epicotyls,plumule,hypocotyls,radicle, hilum,integumentHow many are genetically identical to zygotea)fourb)fivec)sixd)sevenCorrect answer is option 'B'. Can you explain this answer?
Question Description
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