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प्रश्न
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be ______.
विकल्प
8
16
24
32
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उत्तर
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be 16.
Explanation:
The endosperm in angiosperms is usually triploid (3n), formed by the fusion of one male gamete (n) with two polar nuclei (each n), making its chromosome number three times the haploid number (n). Given the endosperm has 24 chromosomes, 24 = 3n, so n = 8. The root tip cells belong to the diploid sporophyte (2n), so the number of chromosomes = 2 × 8 = 16.
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संबंधित प्रश्न
Draw a labelled mature stage of a dicotyledonous embryo.
In which of the following the primary endosperm nucleus undergoes free nuclear division or karyokinesis?
Identify the ploidy of embryo and endosperm respectively formed after following cross.
An angiospermic male plant with 24 chromosomes in its pollen mother cells is crossed with female plant bearing 24 chromosomes in its root cells.
Identify the characteristic feature/s of helobial endosperm.
Which of the following triggers an acrosomal reaction of the sperm?
In dicots, the pollen grains are usually ______
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be ______.
Which of the following statements are true related to Seed X and Y?
 |
 |
| SEED X | SEED Y |
- Seed X is dicot and endospermic or albuminous.
- Seed X is dicot and non-endospermic or non-albuminous.
- Seed Y is a monocot and endospermic or albuminous.
- Seed Y is a monocot and non-endospermic or non-albuminous.
Choose the correct option with the respect to the nature of the seed.
Why does the zygote begin to divide only after the division of Primary endosperm cell (PEC)?
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