with the help of a flow chart explain in brief how the sex of a new born is genetically determined in human beings. which of the two parents the mother or father, is responsible for determination of sex of a child
Answers
Answer:
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
Answer:
A women carries the X chromosomes only. while men carry Both X and Y sperms . The ovum will always carry an x chromosome. If it it fertilized by a sperm carrying X chromosomes , the pair will be XX and the gender of the child will be female. If the sperm carries a Y chromosome the pair will be XY and the gender of the child will be male.
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