Class 10 Science – Chapter 8: Heredity and
Evolution (English Medium)
Important Topics
1Heredity: Definition and Importance
2Inheritance of Traits: Acquired and Inherited Traits
3Mendel’s Experiments on Pea Plants
4Monohybrid Cross and Genotype–Phenotype Ratio
5Dominant and Recessive Traits
6Genetics Terms: Gene, Allele, Chromosome, DNA
7Sex Determination in Human Beings
8Evolution: Meaning and Basic Concept
9Acquired Traits vs Inherited Traits
10 Speciation and Factors Leading to Evolution
Important Questions
Very Short Answer Questions (1 Mark)
1What is heredity?
2Who is known as the father of genetics?
3Name the unit of heredity.
4What are alleles?
5Which chromosomes determine sex in humans?
Short Answer Questions (2–3 Marks)
1Differentiate between acquired traits and inherited traits.
2What is a monohybrid cross?
3Explain dominant and recessive traits with example.
4What is speciation?
5Explain sex determination in human beings.
Long Answer Questions (5 Marks)
1Explain Mendel’s monohybrid cross with a Punnett square.
2How do traits get expressed in organisms?
3Describe the mechanism of sex determination in human beings.
4Explain the process of evolution.
5Differentiate between homologous and analogous organs.
