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NEET UG BIOLOGY MCQ: CELL-CYCLE & CELL DIVISION
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How many meiotic divisions are required to produce 200 seeds in a typical angiosperm?
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Correct option: C
250
Option C (250) is correct because each seed requires one meiotic division in the egg mother cell and four meiotic divisions for each pollen grain that fertilizes the egg, but only one pollen grain is needed. Therefore, 200 eggs require 200 meiotic divisions, and 200 pollen grains require 200/4 = 50 meiotic divisions. Total = 200 + 50 = 250.
More Questions from CELL-CYCLE & CELL DIVISION
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At metaphase of mitosis, each chromosome consists of ________ chromatid(s) _________ centromere(s) _________ kinetochore(s) and _________ molecule(s) of DNA.
Mitosis occurs in:
In which phase, DNA content will be doubled?
Assertion : Cell growth is a continuous process
in terms of cytoplasmic increase.
Reason : DNA synthesis occurs only during
two specific stages in the cell cycle. Interkinesis means What is the approximate duration of cell cycle for a mammalian cell?
in terms of cytoplasmic increase.
Reason : DNA synthesis occurs only during
two specific stages in the cell cycle. Interkinesis means What is the approximate duration of cell cycle for a mammalian cell?