Willer Academy

Class 10 Biology Assessment - Heredity and Evolution

Total Marks

49

Time Allowed

90 min

Date

Aug 15, 2025

General Instructions

• All questions are compulsory
• Read questions carefully before answering
• MCQs have only one correct answer
• Write answers in the spaces provided
• Draw diagrams where necessary
• Manage your time effectively

Section A: 20 minutes | Section B: 30 minutes | Section C: 40 minutes

Section A: Multiple Choice Questions

20 × 1 = 20 Marks

1

Who is known as the 'Father of Genetics'?

Charles Darwin

Gregor Mendel

Louis Pasteur

Hugo de Vries

2

In a monohybrid cross, the phenotypic ratio in F2 generation is:

1:2:1

3:1

9:3:3:1

1:1

3

Which of the following is a recessive trait in humans?

Dimples

Curly hair

Free earlobes

Straight hair

4

The sex chromosome pattern in a human female is:

XX

XY

YY

XO

5

Which of the following is NOT an example of homologous organs?

Human arm and bat wing

Whale flipper and horse leg

Bird wing and insect wing

Human hand and mole paw

6

In humans, the sex of the child is determined by:

Mother

Father

Both parents equally

Environmental factors

7

The process by which new species develop from existing species is called:

Natural selection

Speciation

Genetic drift

Adaptation

8

Which of the following is an acquired trait?

Eye color

Blood group

Body weight

Hair color

9

The fossil of Archaeopteryx shows the link between:

Reptiles and birds

Fish and amphibians

Amphibians and reptiles

Apes and humans

10

Which of the following is NOT a part of Darwin's theory of natural selection?

Overproduction

Struggle for existence

Inheritance of acquired characteristics

Survival of the fittest

[Questions 11-20 continue with similar format]

Section B: Short Answer Questions

10 × 2 = 20 Marks

21

Differentiate between genotype and phenotype with suitable examples.

22

Explain the Law of Dominance using a monohybrid cross example.

23

What is the difference between homologous and analogous organs? Give one example of each.

24

Describe the process of sex determination in humans with a diagrammatic representation.

25

How does the phenomenon of industrial melanism in peppered moths support Darwin's theory of natural selection?

26

Differentiate between inherited traits and acquired traits with two examples of each.

27

What is genetic drift? How does it affect small populations?

28

Explain the significance of fossils in the study of evolution.

29

Draw a flowchart showing the stages of human evolution.

30

Why are traits acquired during the lifetime of an individual not inherited?

Section C: Long Answer Questions

3 × 3 = 9 Marks

31

Explain Mendel's dihybrid cross experiment. What conclusions did he draw from this experiment? Illustrate with a Punnett square showing the F2 generation phenotypic ratio.

32

Describe Darwin's theory of natural selection. How does this theory explain the evolution of long-necked giraffes from short-necked ancestors? Discuss any one evidence that supports the theory of evolution.

33

Trace the evolutionary stages of humans from Australopithecus to Homo sapiens. What are the major anatomical and cultural developments that occurred during human evolution? How does molecular biology provide evidence for human evolution?

Willer Academy - Biology Assessment | Heredity and Evolution

Class 10 | Academic Year 2025-26

Note: This is a sample assessment for practice purposes only