Question

how can you say that the sex of a human baby is genetically determined explain along with the flow chart​

Answer 1

Answer:

The sex of the child is determined genetically in humans.

Women have a perfect pair of sex chromosomes i.e. XX whereas men have a mismatched pair i.e. XY. All eggs produced will carry the X chromosome. Half of the sperms will carry Y chromosome and the other half will carry X chromosome.

During fertilisation, when the egg fuses with a sperm carrying Y chromosome, a boy will be formed On the other hand, when the egg fuses with a sperm carrying X chromosome, the offspring will be a girl child.

 

Parents          XX (Female)                                XY(Male)

                         ↓                                                         ↓

Gametes          X                                                    X          Y

Explanation:

Female →

Male↓

Female-           X                 X

male-X XX (female) XX(female)

         Y XY (male)          XY (male)

Answer 2

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

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