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: B
Solution :
Allopolyploids may also result from doubling of chromosome number in a \[{{F}_{1}}\] hybrid which is derived from two distinctly different species. This will bring two different sets of chromosomes in this \[{{F}_{1}}\] hybrid. The doubling of chromosomes in this \[{{F}_{1}}\] hybrid (AB) will give rise to a tetraploid with two A and two B genomes. Such a polyploid is called an allopolyploid or amphidiploid.
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