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CBSE Class 10  >  Class 10 Test  >  Online MCQ Tests  >  Heredity - 3 - Class 10 MCQ

Heredity - 3 - Free MCQ Test with solutions for Class 10


MCQ Practice Test & Solutions: Heredity - 3 (10 Questions)

You can prepare effectively for Class 10 Online MCQ Tests for Class 10 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Heredity - 3". These 10 questions have been designed by the experts with the latest curriculum of Class 10 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 10 minutes
  • - Number of Questions: 10

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Heredity - 3 - Question 1
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What is the purpose of DNA copying during reproduction?

Detailed Solution: Question 1

DNA copying during reproduction creates variations, which can provide different individuals with advantages for survival. These variations are essential for the adaptability and evolution of species.

Heredity - 3 - Question 2
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What term is used to describe traits that are not expressed in the F1 generation but appear in the F2 generation?

Detailed Solution: Question 2

Recessive traits are those that are masked in the presence of a dominant trait in the F1 generation but can reappear in the F2 generation when two recessive alleles are inherited.

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Heredity - 3 - Question 3
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Which pair of chromosomes determines the sex of a child in humans?

Detailed Solution: Question 3

The sex of a child in humans is determined by the X and Y chromosomes. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

Heredity - 3 - Question 4
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What is the ratio of tall to short plants observed in the F2 generation of Mendel’s experiments on pea plants?

Detailed Solution: Question 4

Mendel observed a phenotypic ratio of 3 tall plants to 1 short plant in the F2 generation, showing that tallness is the dominant trait while shortness is recessive.

Heredity - 3 - Question 5
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What does Mendel's law of independent assortment explain?

Detailed Solution: Question 5

Mendel's law of independent assortment states that genes controlling different traits are inherited independently, leading to new combinations in the progeny, as shown in the F2 generation of his experiments.

Heredity - 3 - Question 6
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What does the dominant allele in Mendel’s experiment represent?

Detailed Solution: Question 6

The dominant allele represents the trait that is expressed even when only one copy of the allele is present. In Mendel's experiments, traits like tallness were dominant.

Heredity - 3 - Question 7
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What would be the possible genotypic ratio of the F2 generation in a monohybrid cross?

Detailed Solution: Question 7

The genotypic ratio in the F2 generation of a monohybrid cross is 1:2:1, corresponding to homozygous dominant, heterozygous, and homozygous recessive individuals, respectively.

Heredity - 3 - Question 8
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What is the role of chromosomes during sexual reproduction?

Detailed Solution: Question 8

Chromosomes ensure the stability of DNA in the species by carrying genetic material from both parents and restoring the normal chromosome number during reproduction.

Heredity - 3 - Question 9
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How is the sex of a child determined in humans?

Detailed Solution: Question 9

The sex of a child is determined by the sperm contributed by the father. If it carries an X chromosome, the child will be a girl (XX). If it carries a Y chromosome, the child will be a boy (XY).

Heredity - 3 - Question 10
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What is the phenotypic ratio of a dihybrid cross in Mendel’s experiments?

Detailed Solution: Question 10

In a dihybrid cross, Mendel observed a phenotypic ratio of 9:3:3:1, showing the independent inheritance of two traits (e.g., seed shape and color).

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About this Class 10 Practice Test

This test contains 10 MCQs on Heredity - 3 with detailed solutions for each question. It is part of the Online MCQ Tests for Class 10 course on EduRev, designed to align with the current Class 10 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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