what is meant by sex determination??
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Sex Chromosome:
Each cell of human beings contains 23 pairs of chromosomes. Out of 23 pairs, 22 pairs are similar and they are known as autosomes whereas 23rd pair is different from autosomes which are called as sex chromosomes because they play an important role in the determination of sex. In the cells of man, there are two types of sex chromosomes (XY) present while the cells of women have two similar sex chromosomes (XX).
After spermatogenesis, two types of sperms are formed:
(1)One having 22+X chromosomes and
(2)Other having 22+Y chromosomes. But, in woman there is only one type ovum formed which contains 22 + X chromosomes only. At the time of fertilization, when a sperm having 22+ X chromosome is fused with ovum. They produce a female child having two "XX' chromosomes. But when a sperm having 22 +Y chromosomes is fused with ovum, then resulting offspring will contain "XY' sex chromosomes, hence it is a male child.
Each cell of human beings contains 23 pairs of chromosomes. Out of 23 pairs, 22 pairs are similar and they are known as autosomes whereas 23rd pair is different from autosomes which are called as sex chromosomes because they play an important role in the determination of sex. In the cells of man, there are two types of sex chromosomes (XY) present while the cells of women have two similar sex chromosomes (XX).
After spermatogenesis, two types of sperms are formed:
(1)One having 22+X chromosomes and
(2)Other having 22+Y chromosomes. But, in woman there is only one type ovum formed which contains 22 + X chromosomes only. At the time of fertilization, when a sperm having 22+ X chromosome is fused with ovum. They produce a female child having two "XX' chromosomes. But when a sperm having 22 +Y chromosomes is fused with ovum, then resulting offspring will contain "XY' sex chromosomes, hence it is a male child.
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Answer:
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two sexes. In some species there are hermaphrodites
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