ICSE Class 10 Genetics — Basic Fundamentals — Mock Test (2027)
Free online mock test for Genetics — Basic Fundamentals (ICSE Class 10 Biology) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Genetics — Basic Fundamentals chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.Explain the following terms: (i) Law of Dominance:
- A.Out of a pair of contrasting alleles present together, only the recessive allele is able to express itself while the dominant remains suppressed.
- B.Out of a pair of contrasting alleles present together, only the dominant allele is able to express itself while the recessive remains suppressed.
- C.Out of a pair of contrasting alleles present together, both the dominant and recessive cannot express themselves.
- D.Out of a pair of contrasting alleles present together, both the dominant and recessive can express themselves.
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2.In the context of tongue rolling, which one of the following correctly identifies the homozygous dominant and homozygous recessive genotypes from the given options: Rr, rr, RR?
- A.Homozygous dominant: RR, Homozygous recessive: Rr
- B.Homozygous dominant: RR, Homozygous recessive: rr
- C.Homozygous dominant: Rr, Homozygous recessive: rr
- D.Homozygous dominant: rr, Homozygous recessive: RR
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3.Which of the following in humans are established genetic traits? (Tick-mark the correct ones)
- i.Capacity to be a good cricketer
- ii.Curly hair
- iii.Left-handedness
- iv.Quality of voice
- v.Red-green colour blindness
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4.Can there be a heterozygous recessive genotype? Why or why not?
- A.No, because heterozygous individuals have one dominant and one recessive allele, so the recessive trait is not expressed.
- B.Yes, because heterozygous individuals can express both dominant and recessive traits simultaneously.
- C.No, because heterozygous individuals must have two identical alleles to be considered recessive.
- D.Yes, because the recessive allele can sometimes override the dominant allele in heterozygous individuals.
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5.Four friends P, Q, R and S were discussing the examples of genetic disorders. The examples they quoted were as follows: P. Colour blindness and Malaria Q. Albinism and Cholera R. Haemophilia and Colour blindness S. Haemophilia and Albinism Who gave the correct examples?
- a.P and Q
- b.R and S
- c.P and R
- d.Q and S
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