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CBSE Class 10 Answered

explain that it is a matter of chance whether a couple will give birth toto a boy or a girl
Asked by | 12 Mar, 2008, 09:52: AM
answered-by-expert Expert Answer
  • Humans have 22 pairs of autosomes and 1 pair of sex chromosome.
  • Male parent produces X bearing and Y bearing gametes or sperms.
  • Female parent produces only X bearing gametes or eggs.
  • During reproduction, the combination of X bearing gamete from males with one X bearing gamete from females results in offspring with genetic constitution– XX. The child produced is a female or a daughter.
  • The combination of Y chromosome from males with one X chromosome from females results in an offspring with genetic constitution – XY. The child produced is a male or a son.
  • Thus, the birth of a boy or a girl is purely a matter of chance and entirely depends on the type of sperm which fertilises the egg.
Answered by | 12 Dec, 2017, 04:31: PM

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