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Bihar Board Class 10 (BSEB) Heredity — practice questions

Explore 16 free Heredity questions in Bihar Board Class 10 (BSEB) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Heredity questions and exercises with answers

Showing questions 1–16 of 16.

Who is known as the Father of Genetics?Read the answer and worked solution →In Mendel's monohybrid cross, the phenotypic ratio in F₂ generation was:Read the answer and worked solution →The phenotypic ratio in F₂ of a dihybrid cross is:Read the answer and worked solution →How many pairs of chromosomes are there in a human somatic cell?Read the answer and worked solution →What is the genotype of a heterozygous tall pea plant?Read the answer and worked solution →Sex of a human child is determined by the chromosome contributed by:Read the answer and worked solution →Which of the following is an ACQUIRED trait, not an inherited one?Read the answer and worked solution →In a cross between two heterozygous tall pea plants (Tt × Tt), what fraction of the offspring will be pure dwarf?Read the answer and worked solution →Which pair of alleles correctly represents a homozygous condition?Read the answer and worked solution →Mendel's law of independent assortment applies to:Read the answer and worked solution →In a dihybrid cross with 9:3:3:1 ratio of offspring, what fraction shows both recessive traits?Read the answer and worked solution →Which of these is NOT possible for the offspring of a TT × tt cross?Read the answer and worked solution →Match the genotype to its phenotype (pea plant) (CBSE Cl 10)Read the answer and worked solution →Sort: inherited trait or acquired trait? (CBSE Cl 10)Read the answer and worked solution →Memory match: ratios from Mendel's experiments (CBSE Cl 10)Read the answer and worked solution →True or false on inheritance (CBSE Cl 10)Read the answer and worked solution →

Worked practice questions

Who is known as the Father of Genetics?

  1. Charles Darwin
  2. Thomas Hunt Morgan
  3. Hugo de Vries
  4. Gregor Johann Mendel
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Correct answer: D. Gregor Johann Mendel

1. Mendel was an Austrian friar who studied pea plants in the 1860s. 2. He worked out the basic rules of inheritance from his pea crosses. 3. His laws of dominance, segregation and independent assortment laid the foundation of genetics. 4. So he is honoured as the Father of Genetics. _Source: syllabus Science Ch 9 'Heredity' (learncbse.in extract)_

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In Mendel's monohybrid cross, the phenotypic ratio in F₂ generation was:

  1. 3:1
  2. 1:1
  3. 9:3:3:1
  4. 1:2:1
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Correct answer: A. 3:1

1. Mendel crossed pure tall (TT) and pure dwarf (tt) pea plants. 2. The F₁ generation was all tall hybrids (Tt). 3. Self-pollinating F₁ gave the F₂ generation with TT, Tt, Tt and tt. 4. Three out of four are tall (TT, Tt, Tt) and one out of four is dwarf (tt). 5. So the phenotypic ratio in F₂ is 3:1. _Source: syllabus Science Ch 9 'Heredity' (learncbse.in extract)_

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The phenotypic ratio in F₂ of a dihybrid cross is:

  1. 3:1
  2. 9:3:3:1
  3. 1:1:1:1
  4. 1:2:1
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Correct answer: B. 9:3:3:1

1. In a dihybrid cross two pairs of contrasting characters are followed at once. 2. Mendel crossed round-yellow seeded plants with wrinkled-green ones. 3. The F₁ generation was all round-yellow (both dominant). 4. F₂ self-cross gave four phenotype groups in the ratio 9:3:3:1. 5. So the F₂ phenotypic ratio in a dihybrid cross is 9:3:3:1. _Source: syllabus Science Ch 9 'Heredity' (learncbse.in extract)_

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