A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
E) If the assertion is false but reason is true
Correct Answer: C
Solution :
Crossing over refer to the exchange of segments of chromosomes. Crossing over occurs after duplication of the chromosomes rather than prior to their duplication is most easily obtained by studying fungi of the class known as Ascomycetes.
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