If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?

Important Questions on Heredity and Evolution

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Short Answer Type Questions>Q 28

What sizes of plants are produced if both parents have genes Tt?

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Short Answer Type Questions>Q 29

In a human, how many chromosomes are present in:
(a) a brain cell?
(b) a sperm in the testes?
(c) an egg which has just been produced by the ovary?
(d) a skin cell?
(e) a fertilised egg?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Short Answer Type Questions>Q 30

Gregor Mendel's first law of genetics states "Of a pair of contrasted characters, only one can be represented in a gamete by its internal 'factor'.
(a) Give the modern name for this 'factor'.
(b) State where these factors are found in gametes.

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Short Answer Type Questions>Q 31

Does genetic combination of mother play a significant role in determining the sex of a new born baby?

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Short Answer Type Questions>Q 32

Give the contrasting traits of the following characters in pea plant and mention which is dominant and which is recessive: (a) Yellow seed (b) Round seed.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Long Answer Type Questions>Q 33

What is meant by 'heredity'? What are the units of heredity.

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 3 Biology>Chapter 4 - Heredity and Evolution>Long Answer Type Questions>Q 33

State Mendel's first law of inheritance.

MEDIUM

10th CBSE