ICSE Class 10 Principles of Inheritance and Variation — Mock Test (2027)
Free online mock test for Principles of Inheritance and Variation (ICSE Class 10 Botany) — 87 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 Principles of Inheritance and Variation 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.In a cross between a tall plant with yellow seeds (TtYy) and a tall plant with green seeds (Ttyy), what proportion of the offspring is expected to be dwarf and green?
- A.1 by 16
- B.1 by 8
- C.3 by 16
- D.1 by 4
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2.In humans, what is the probability that a couple's next child will be a male, irrespective of the sex of previous children?
- A.25 per cent
- B.50 per cent
- C.75 per cent
- D.100 per cent
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3.In incomplete dominance, the F1 phenotype is intermediate because:
- A.Both alleles produce their own sugars
- B.One allele (R) is not completely dominant over the other (r)
- C.Three alleles govern the trait
- D.A single gene affects many phenotypes
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4.In a typical test cross of a heterozygous dominant (Tt) plant with a homozygous recessive (tt) plant, the expected phenotypic ratio of the progeny is:
- A.3:1
- B.1:1
- C.1:2:1
- D.9:3:3:1
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5.A child has blood group O. The father has blood group A and the mother blood group B. What are the genotypes of the parents?
- A.Father IA IA, Mother IB IB
- B.Father IA i, Mother IB i
- C.Father IA IB, Mother ii
- D.Father ii, Mother IB i
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