Science Chapter 8 Multiple Choice Questions CBSE

In the fascinating realm of biology, the study of heredity forms a fundamental cornerstone. Join us as we explore the concepts of heredity in our adventure of learning biology.

10 MCQs on Chapter 8 – Heredity

Here are 10 multiple-choice questions (MCQs) based on Chapter 8 – Heredity from the NCERT Class 10 Science book:

1. Which of the following is responsible for the transmission of hereditary traits from one generation to the next in living organisms?

a) Genes

b) Environment

c) Mutations

d) Hormones

2. Mendel’s experiments were based on the study of:

a) Human genetics

b) Pea plants

c) Bacteria

d) Insects

3. In Mendel’s experiments, the first filial generation (F1) resulted from the cross of:

a) Two purebred parents

b) Two hybrid parents

c) Two mutants

d) Two unrelated plants

4. The term “allele” refers to:

a) Different forms of the same gene

b) Offspring of two different species

c) Genetic mutations

d) Chromosomal abnormalities

5. If a trait is controlled by more than one gene, it is known as:

a) Monohybrid inheritance

b) Dihybrid inheritance

c) Polygenic inheritance

d) Incomplete dominance

6. In humans, which of the following chromosomes determine the gender of the offspring?

a) X and Y chromosomes

b) X chromosomes only

c) Y chromosomes only

d) Autosomal chromosomes

7. Hemophilia is a sex-linked recessive disorder. If a carrier female (XhX) marries a normal male (XY), what is the probability of their son having hemophilia?

a) 0%

b) 25%

c) 50%

d) 100%

8. Which of the following disorders is caused by an extra chromosome (trisomy) in humans?

a) Down syndrome

b) Hemophilia

c) Cystic fibrosis

d) Sickle cell anemia

9. The process of the transfer of pollen grains from the anther to the stigma of a flower is known as:

a) Fertilization

b) Pollination

c) Reproduction

d) Budding

10. When two genetically dissimilar individuals are crossed, the offspring are referred to as:

a) Purebred

b) Hybrid

c) Mutants

d) Clones

Answer Key:

1. a) Genes
2. b) Pea plants
3. a) Two purebred parents
4. a) Different forms of the same gene
5. c) Polygenic inheritance
6. a) X and Y chromosomes
7. d) 100%
8. a) Down syndrome
9. b) Pollination
10. b) Hybrid

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