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
-
1.What is the technique called where the genetic constitution of an organism is altered by introducing new genes into its chromosomes?
- A.Genetic mutation
- B.Genetic engineering
- C.Cloning
- D.Gene therapy
-
2.In a certain species of animals, black fur (B) is dominant over brown fur (b). What is the expected phenotypic ratio of offspring when both parents are heterozygous (Bb) for black fur?
- A.3 black : 1 brown
- B.1 black : 1 brown
- C.All black
- D.All brown
-
3.Which of the following correctly differentiates between phenotype and genotype?
- A.Phenotype is the genetic makeup; genotype is the observable trait.
- B.Phenotype is the observable trait; genotype is the genetic makeup.
- C.Both phenotype and genotype refer to observable traits.
- D.Genotype is the physical appearance; phenotype is the gene set.
-
4.Work out the progeny in the following Punnett square for a marriage between a carrier woman (XX°) and a colour-blind man (X°Y). Which labelled cell in the diagram (img-15.jpeg) represents the genotype of a colour-blind daughter?
- A.The cell showing XX°
- B.The cell showing X°X°
- C.The cell showing XY
- D.The cell showing X°Y
-
5.(ii) Mutation:
- A.It is a sudden change in one or more genes in an organism's cells which is heritable.
- B.It is a change in the number of centrosomes in an organism's cells which is heritable.
- C.It is a change in the structure of cell membrane in an organism's cells which is heritable.
- D.It is a change in the shape of cells which is heritable.
Ready? Take the full 20-question test free — instant marking, no sign-up needed.
▶ Start free mock test