Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Assertion : If a pollen mother cell has 42 chromosomes,
the pollen has only 21 chromosomes.
Reason : Pollens are formed after meiosis in pollen mother
cell.
(a) If both Assertion and Reason are true and the Reason is
the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is
not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.
Answer:
(a) Pollen mother cells undergo meiosis and produce
pollen grains. The pollen grains have haploid number
of chromosomes.
( All MCQs from NCERT & Important points and explanations from NCERT)
