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Q. 8. Write notes on:
(a) Adam's apple.
(b) Secondary sexual characters.
(c) Sex determination in the unborn baby. in easy and simple or short answer for class 8
Answers
Explanation:
a)The Adam's apple is a lump of cartilage that sticks out from the throat. It is more prominent in males, and it serves no specific function. ... Adam's apples develop during puberty and are not present in prepubescent children. They are often more prominent in males, who tend to develop larger larynxes than females.
b)Differences in size between sexes are also considered secondary sexual characteristics. In humans, visible secondary sex characteristics include pubic hair, enlarged breasts and widened hips of females, and facial hair and Adam's apples on males.
c)The sex of the unborn baby is determined by the sex chromosomes of the father. An egg has two X chromosome while a sperm has a X and a Y chromosome. ... Therefore, if the sperm contributes X chromosome then the baby will be a female (XX) and if the sperm contributes the Y chromosome, the baby will be a male (XY
(a) Adam's Apple⸻➤
At puberty, the voice box or the larynx begins to grow. Bóys develop larger voice boxes. The growing voice box in boys can be seen as a protruding part of the throat which is called Adam's apple .
(b) secondary Sexual characters ⸻➤
Testes and ovaries are the reproductive organs they produce the gametes that is , sperm and ova . In gırls some body parts begin to develop at puberty and bóys begin to grow facial hairs , that is moustaches and beared. As these features help to distinguish the male from the female thay are called secondary Sexual characters.
(c) sėx determination of unborn baby⸻➤
The sex of a child is determined at the time of fertilization. when a male gamete fusion with female gamete . All human beings have 23 pairs of chromosomes in the nuclei of their cell 2 chromosome out of these are sex hormones. Female two X chromosome while male have X and Y chromosomes.
hope it helps you