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Which of the following determines the sex of the offspring in male heterogametic conditions?

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in Biology – Class 12 by (271k points)
Which of the following determines the sex of the offspring in male heterogametic conditions?

(a) Egg

(b) Sperm

(c) Both egg and sperm

(d) It cannot be determined

This question was addressed to me in an international level competition.

I'm obligated to ask this question of Inheritance and Variation Principles in portion Principles of Inheritance and Variation of Biology – Class 12

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Right option is (b) Sperm

To elaborate: When the condition of male heterogamety is present, then sperm determines the sex of the offspring because two kinds of sperms are present, one with X-chromosome and the other with Y-chromosome. Eggs of an individual are the same as both of them contain 22+ X chromosomes.

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