Class 10 Science - Chapter Heredity and Evolution NCERT Solutions | How is the equal genetic contribution of
How is the equal genetic contribution of male and female parents ensured in the progeny?
Equal genetic contribution of male and female parents is ensured by the equal number of inheritance of chromosomes. Human beings possess a normal diploid (2N) chromosome number in human beings is 46. Each body cell contains 23 pairs of chromosomes, with 22 pairs of autosomes and one pair of sex chromosome. The autosomes are similar in male and female but one sex chromosome is different in both. In females, sex chromosomes are same XX and heteromorphic in males, i.e, XY. Sex chromosomes control the sex of an individual. One male haploid gamete and one female haploid gamete form a diploid cell gamete by sharing equal amounts of genetic material from both paternal and maternal parents. If the zygote receives one X chromosome from a female and another X chromosome from male then the child will be female, i.e, XX. And when the zygote receives one X chromosome from a female and another Y chromosome from male then the child will be male.
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