Reaching Age of Adolescence
(Worksheet)
1. Adolescents become capable of reproduction when their ___________ and ________ begin to produce gametes
2. In human females the reproductive phase of life begins at________ and lasts till the age of ________ years.
3. __________ no. of chromosomes are present in the human gametes.
4. __________ and _________ are sex chromosomes.
5. An ovum has __________ sex chromosome while a sperm has _________ sex chromosome.
6. The gametes posses only __________ set of chromosomes.
7. Human sperms are of ____________ types as they carry either ___________ or ___________ sex chromosomes.
8. ____________ glands maintain salt balance in the body.
9. Adrenaline is secreted from the ___________ gland.
10. Growth hormone is secreted from the _________ gland.
11. The change from larva to adult is called ___________.
12. Deficiency of _________ in general leads to goitre.
13. The hormone _______ released by the __________ gland gives sudden energy to the body to fight or run away when in danger.
14. The larynx is bigger in ________ (boys/girls).
15. The growth of facial hair, that is, the beard and moustache, is a ________ ________ characteristic visible during adolescence.
16. __________ is the fusion of a sperm and an ovum.
17. In India, the legal age for marriage is _____ years for a boy and _____ years for a girl.
Answers:
1: testes, ovaries
2: puberty (10 to 12 years of age), 45-50
3: 23
4: Testosterone, Oestrogen
5: female (Oestrogen), Male (Testosterone)
6: half/unpaired
7: two types, X, Y
8: Aldosterone
9: adrenal
10: pituitary gland
11: Metamorphosis
12: iodine
13: adrenaline, adrenal
14: boys
15: secondary sexual
16: Fertilisation
17: 21, 18
