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Reaching The Age Of Adolescence

Question
CBSEENSC8005423
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Write notes on :

Sex determination in the unborn baby.

Solution

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. An egg will always have an X 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). So it is the father, who is responsible for the sex of the baby.

Some More Questions From Reaching The Age of Adolescence Chapter

List the changes in the body that take place at puberty.

Prepare a Table having two columns depicting names of endocrine glands and hormones secreted by them.

What are sex hormones? Why are they named so? State their function.

Choose the correct option.

Adolescents should be careful about what they eat, because

Choose the correct option.

Reproductive age in women starts when their

Choose the correct option.

The right meal for adolescents consists of

Write notes on :

Adam’s apple.

Write notes on :

Secondary sexual characters.

Write notes on :

Sex determination in the unborn baby.

Word game : Use the clues to work out the words.

Across

3. Protruding voice box in boys

4. Glands without ducts

7. Endocrine gland attached to brain

8. Secretion of endocrine glands

9. Pancreatic hormone

10. Female hormone

Down

1. Male hormone

2. Secretes thyroxine

3. Another term for Teenage

5. Hormone reaches here through blood stream

6. Voice box

7. Term for changes at adolescence.

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