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Question: Answered & Verified by Expert
In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome bearing organisms are
BiologyPrinciples of Inheritance and Variation
Options:
  • A
    males and females respectively
  • B
    females and males, respectively
  • C
    all males
  • D
    all females
Solution:
2665 Upvotes Verified Answer
The correct answer is:
males and females respectively
In certain insects, such as cockroach, and some roundworms, the Y-chromosome is missing so that the male has only one sex chromosome, i.e. ' $\mathrm{X}$ ' condition in the male is $\mathrm{XO}$ (O means absence of one sex chromosome) and in the female it is $\mathrm{XX}$., thus males showing 17 chromosome while females show 18 chromosome.

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