explain the sex determination of baby in human with diagram ? Related: Determination of Sex of a Baby, Reaching the Age of Adolescence, Class 8 Science

Question

explain the sex determination of baby in human with diagram ? Related:  Determination of Sex of a Baby, Reaching the Age of Adolescence, Class 8 Science

Answer

In humans’ the sex of the baby is determined by the sperm.  The sperm gamete is heterogamatic because approximately half of them contain the X chromosome which will result in a girl and approximately half of them contain the Y chromosome which will result in a boy.  On the other hand the ova gamete is homogametic, in other words all its cells possess the X chromosome.  Thus the ova gamete does not influence the baby’s sex.  Therefore when a sperm penetrates the ova and fertilization occurs there are two possible outcomes:  XX or a girl and XY or a boy.

Answer

Answer

Sex Determination of a Baby in Humans

Sex determination is the process by which the sex of a baby is established during early development. In humans, the sex of a baby is determined by the combination of sex chromosomes inherited from the parents. Let's understand the sex determination process in detail:

1. Chromosomes and Sex
- Humans have 23 pairs of chromosomes, out of which 22 pairs are called autosomes and the remaining pair is known as the sex chromosomes.
- The two sex chromosomes are labeled as X and Y. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

2. Inheritance of Sex Chromosomes
- The sex chromosomes are inherited from the parents. The mother always contributes an X chromosome, while the father can contribute either an X or a Y chromosome.
- If the father donates an X chromosome, the resulting combination (XX) will develop into a female baby.
- If the father donates a Y chromosome, the resulting combination (XY) will develop into a male baby.

3. Fertilization
- During sexual reproduction, a sperm cell from the father and an egg cell (ovum) from the mother combine to form a fertilized egg (zygote).
- The sperm cells carry either an X or a Y chromosome, while the egg cells always carry an X chromosome.

4. Sex Determination Process
- When the fertilization occurs, the sex of the baby is determined by the combination of sex chromosomes in the zygote.
- If the zygote receives an X chromosome from the father's sperm and an X chromosome from the mother's egg, it will develop into a female baby (XX).
- If the zygote receives an X chromosome from the mother's egg and a Y chromosome from the father's sperm, it will develop into a male baby (XY).

5. Development of Reproductive Organs
- After the sex determination process, the reproductive organs of the baby start developing according to its sex.
- In females, the reproductive system develops as ovaries, fallopian tubes, uterus, and vagina.
- In males, the reproductive system develops as testes, vas deferens, seminal vesicles, and penis.

6. Secondary Sexual Characteristics
- During puberty, secondary sexual characteristics develop in both males and females.
- Females experience breast development, widening of hips, and onset of menstruation.
- Males experience deepening of the voice, facial hair growth, and enlargement of the Adam's apple.

Overall, the sex determination of a baby in humans is determined by the combination of sex chromosomes received from the parents. It is an essential biological process that influences the development of reproductive organs and secondary sexual characteristics.

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

G Jog

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