CUET · BIOLOGY · PYQ PAPER 2025
Read the passage carefully and answer the questions based on the passage:
Pollen pistil interaction involves all events from the landing of pollen grains on the stigma until the pollen tube enters the embryo sac (when the pollen is compatible). When a pollen tube grows through the style and enters into the ovules, it finally discharges two male gametes in one of the synergids. Syngamy and triple fusion are two fusion events occur in angiosperms. Thus, angiosperms exhibit double fertilization. The products of these fusions are the diploid zygote and triploid primary endosperm nucleus. Zygote develops into embryo and primary endosperm cell forms the endosperm tissue. The developing embryo passes through different stages before maturation.
If there are 38 chromosomes in the zygote, how many chromosomes will be there in its haploid egg cell?
- A 38
- B 57
- C 19
- D 76
Answer & Solution
Correct Answer
(C) 19
Step-by-step Solution
Detailed explanation
Zygote is diploid (2n). Egg cell is haploid (n). \(2n = 38\) \(n = 38 / 2 = 19\)
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