Mendel's Laws of Inheritance — Homi Bhabha Exam Biology MCQs with Solutions
Free Homi Bhabha Exam Biology Mendel's Laws of Inheritance MCQs with step-by-step solutions (10 questions). Part of Heredity & Genetics. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Mendel's Laws of Inheritance · medium · theory
The scientist regarded as the "Father of Genetics", who worked on pea plants, is:
A. Watson
B. Gregor Mendel ✓ Correct
C. Louis Pasteur
D. Charles Darwin
Solution: Gregor Mendel established the laws of inheritance through experiments on garden pea plants.
Q2 — Mendel's Laws of Inheritance · hard · theory
A trait that appears in the first generation (F₁) and masks the other is called:
A. acquired
B. dominant ✓ Correct
C. recessive
D. hybrid
Solution: The dominant trait is expressed in the F₁ generation, masking the recessive one.
Q3 — Mendel's Laws of Inheritance · medium · theory
A trait that remains hidden in the F₁ generation is called:
A. mutant
B. acquired
C. recessive ✓ Correct
D. dominant
Solution: The recessive trait does not appear in F₁ but can reappear later.
Q4 — Mendel's Laws of Inheritance · hard · theory
When a pure tall pea plant (TT) is crossed with a pure dwarf plant (tt), the F₁ offspring are all:
A. medium height
B. tall (Tt) ✓ Correct
C. half tall, half dwarf
D. dwarf (tt)
Solution: All F₁ plants are Tt and appear tall, since tallness (T) is dominant.
Q5 — Mendel's Laws of Inheritance · hard · theory
In Mendel's monohybrid cross, the phenotypic ratio obtained in the F₂ generation is:
A. 2 : 1
B. 1 : 1
C. 3 : 1 ✓ Correct
D. 9 : 3 : 3 : 1
Solution: Self-pollinating the F₁ (Tt) gives a 3 : 1 ratio of dominant to recessive in F₂.
Q6 — Mendel's Laws of Inheritance · medium · theory
The genetic makeup of an organism (e.g. Tt) is called its:
A. chromosome
B. phenotype
C. genotype ✓ Correct
D. gene pool
Solution: Genotype is the set of alleles (e.g. Tt); phenotype is the visible expression.
Q7 — Mendel's Laws of Inheritance · hard · theory
The observable characteristics of an organism (e.g. its height or flower colour) are called its:
A. chromosome
B. phenotype ✓ Correct
C. genotype
D. allele
Solution: Phenotype refers to the visible traits produced by the genotype and environment.
Q8 — Mendel's Laws of Inheritance · hard · theory
A plant with the genotype Tt is described as:
A. heterozygous (hybrid) tall ✓ Correct
B. pure dwarf
C. homozygous tall
D. homozygous dwarf
Solution: Tt has two different alleles, so it is heterozygous (a hybrid), and it appears tall.
Q9 — Mendel's Laws of Inheritance · medium · theory
Mendel chose the garden pea for his experiments partly because it has:
A. clearly contrasting characters and a short life cycle ✓ Correct
B. no seeds
C. no flowers
D. a very long life cycle
Solution: Pea plants show clear contrasting traits, are easy to cross and grow quickly.
Q10 — Mendel's Laws of Inheritance · hard · theory
Mendel's law of segregation states that during gamete formation, the two alleles of a trait:
A. separate so that each gamete gets only one ✓ Correct
B. both go into every gamete
C. disappear
D. always stay together
Solution: Each gamete receives only one allele of a gene, which recombine at fertilisation.