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Question : What is male heterogamety? Explain sex determination in human |
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Answer» Solution :Male heterogamety is the phenomenon where the males produce two different types of gametes/sperms some with X-chromosome and some with Y-chromosome with reference to sex chromosomes. The males have an X - Chromosome and another small, but characteristically shaped Y - Chromosome i.e., males have XY-Chromosomes along with other AUTOSOMES. The females have two Y-chromosomes along with other autosomes. It is a case of male heterogamy, where the males produce two types of sperms, `50%` of sperms having X-Chromosome and the other `50%` with Y-Chromosome The female are HOMOGAMETIC and produce all OVA with one X - Chromosome each. Sex of an individual is decided at the time of fertilization by the kind of sperm fertilizing the OVUM it is as given below 
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