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

Heredity - 3 - Class 10 MCQ


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10 Questions MCQ Test Online MCQ Tests for Class 10 - Heredity - 3

Heredity - 3 for Class 10 2026 is part of Online MCQ Tests for Class 10 preparation. The Heredity - 3 questions and answers have been prepared according to the Class 10 exam syllabus.The Heredity - 3 MCQs are made for Class 10 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Heredity - 3 below.
Solutions of Heredity - 3 questions in English are available as part of our Online MCQ Tests for Class 10 for Class 10 & Heredity - 3 solutions in Hindi for Online MCQ Tests for Class 10 course. Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free. Attempt Heredity - 3 | 10 questions in 10 minutes | Mock test for Class 10 preparation | Free important questions MCQ to study Online MCQ Tests for Class 10 for Class 10 Exam | Download free PDF with solutions
Heredity - 3 - Question 1
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What is the purpose of DNA copying during reproduction?

Detailed Solution for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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 for Heredity - 3 - 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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