Question

How is the sex determined in human beings? Explain with the help of a flow chart.
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Answer 1

Answer:

In the human being, the chromosomal mechanism of sex determination is of XX-XY type. In human the nucleus of each cell contains 46 chromosomes or 23 pairs of chromosomes of body characters) and 1 pair is of sex chromosomes (responsible for determination of sex).

1. In the female, two homomorphic sex chromosomes are XX.

2. In the male, two

heteromorphic sex chromosomes are XY.

3. The genotypes of female and male is

Female : 46 Chromosomes = 44 Autosomes + XX sex chromosomes

Male : 46 Chromosomes = 44 Autosomes + XY sex chromosomes

solution