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In which of the following animals, there is a difference between the male and female numbers of chromosomes?

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In which of the following animals, there is a difference between the male and female numbers of chromosomes?

(a) Humans

(b) Drosophila

(c) Grasshopper

(d) Pigeon

I have been asked this question in my homework.

This interesting question is from Inheritance and Variation Principles in chapter Principles of Inheritance and Variation of Biology – Class 12

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Right choice is (c) Grasshopper

To explain: In a grasshopper, male and female individuals have a different number of chromosomes because grasshoppers exhibit XO type of male heterogamety where 2 kinds of sperms are formed- one with X-chromosome and the other with no sex chromosome.

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