✓ Board-verified
Biology · 2024 · 3 marks
CBSE 2024 · Region 5 · Set 1 · Q25
If the cells in the leaves of a maize plant contain 10 chromosomes each, write the number of chromosomes in its endosperm and zygote. Name and…
If the cells in the leaves of a maize plant contain $\displaystyle 10$ chromosomes each, write the number of chromosomes in its endosperm and zygote. Name and explain the process by which an endosperm and a zygote are formed in maize.
Marking-scheme solution
• Endosperm – $\displaystyle 15$ chromosomes
Zygote – $\displaystyle 10$ chromosomes
• Endosperm is formed by the process of triple fusion, the fusion of two
polar nuclei with one male gamete,
Zygote is formed by the process of syngamy, the fusion of egg cell
with a male gamete.All Sexual Reproduction in Flowering Plants questions2024 question paperNCERT solutions: Sexual Reproduction in Flowering PlantsPractice Sexual Reproduction in Flowering Plants →
More from Sexual Reproduction in Flowering Plants
- Choose the option that gives the correct number of pollen grains that will be formed after 325 microspore mother cells undergo microsporogenesis.2026 · asked 2×
- In which one of the following floral plants are many embryos formed in the seeds without fertilisation of the egg cell?2024
- Explain the process of the development of a male gametophyte in an angiosperm. Why is it called a male gametophyte?2023
- In angiosperms, the female gametophyte develops from a single cell of megasporangium. (i) Name that cell of megasporangium and describe the…2026
- Some flowers are unisexual, this property of unisexuality of flowers prevents which kind of pollination?2025
- The ploidy of apomictic embryos developing from the nucellus and antipodal cells respectively would be:2024
- Given below are stages of embryo sac formation from megaspore mother cell. Identify the correct option for the cell division marked a, b, c and d.2026
- Draw a T.S. of a mature anther of an angiosperm. Label its any three wall layers and mention their functions.2024
CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.