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Class 10 Exam  >  Class 10 Tests  >  Science Class 10  >  Heredity - 3 - Class 10 MCQ

Heredity - 3 - Class 10 MCQ


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10 Questions MCQ Test Science Class 10 - Heredity - 3

Heredity - 3 for Class 10 2025 is part of Science 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 2025 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 Science Class 10 for Class 10 & Heredity - 3 solutions in Hindi for Science 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 Science 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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