Question

33. Mention the total number of chromosomes along with the sex chromosomes that are
present in a human female and a human male. Explain how in sexually reproducing
organisms the number of chromosomes in the progeny remains the same as that of the
parents.
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Answer 1

Answer:

The total number of chromosomes present in both human male and female is 46. ... In human males, the two sex chromosomes present are X and Y, while in human female, both sex chromosomes are X. During sexual reproduction, the new individual is formed by the fusion of gametes from both the parents.

Answer 2

Total number of chromosomes is 46. In humans, two sex chromosomes present are X and Y, while in the human female, both sex chromosomes are X. During sexual reproduction, a female gamete or egg cell fuses with a male gamete or sperm cell which are haploid to form a zygote. A zygote is diploid which contains 23 chromosomes from mother and 23 from father. In this way, an equal genetic contribution of male and female parents is ensured in the Progeny.