A) triploid with 21 chromosome
B) hexaploid with 42 chromosome
C) tetraploid with 30 chromosome
D) diploid with 14 chromosome
Correct Answer: B
Solution :
Common cultivated wheat is an example of allopolyploidy. Triticum aestivium is hexaploid with 2n = 42 and derived from three diploid species (i) AA = Triticum aequilopoides (2n = 14) (ii) BB = Aegilops speltoides (24=14) (iii) DD= Aegilops squarrossa (24 = 14). Allopolyploidy is the doubling of chromosome number in F1 hybrid which is derived from two distinctly different species.
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