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.Which plant did Mendel use for his experiments on genetics?
- A.Corn
- B.Wheat
- C.Garden pea (Pisum sativum)
- D.Sunflower
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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.(viii) A family has a history of colour blindness. During a genetic testing, it was found that the mother is a carrier of colour blindness (X²X) and the father has normal vision (XY). What is the probability of their sons being colour blind?
- A.25%
- B.50%
- C.75%
- D.0%
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4.Which of the following correctly explains how sex is determined in humans?
- A.The female parent determines the sex of the child by contributing either an X or Y chromosome.
- B.If the sperm bearing the X chromosome fertilizes the ovum, the zygote is XY, resulting in a male child.
- C.If the sperm bearing the Y chromosome fertilizes the ovum, the zygote is XY, resulting in a male child.
- D.The male and female parents each contribute an X chromosome, resulting in a female child.
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5.How many pairs of contrasting characters did Mendel use in his work on pea plants?
- A.Five
- B.Six
- C.Seven
- D.Eight
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