In the hexaploid wheat (42 chromosomes), the haploid (n) and monoploid (x) number of chromosomes are:
A
n = 21 and x = 21
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B
n = 21 and x = 14
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C
n = 21 and x = 7
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D
n = 7 and x =21
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Solution
The correct option is C n = 21 and x = 7 The monoploid (x) number is the number of chromosomes in a single set. Since the number of chromosomes in hexaploid wheat is 42, the monoploid number will be 426=7. The haploid (n) number is the number of chromosomes in a gamete. For hexaploid wheat, the gamete will be triploid. The haploid number of chromosomes =7×3=21.