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ICSE Question Bank

Genetics – Some Basic Fundamentals

Appeared in 10 of the 11 available papers.

Examined in
10 of 11 papers

Appears almost every year — treat as core

Typically worth
6.2 marks

Average per paper it appears in · 62 marks in total

Usual form
Short answer

27% of this chapter's 62 questions

Needs a diagram
8%

5 questions carry a figure — practise drawing them

Question-type distribution

  • Short answer17
  • MCQ14
  • Definition13
  • Reasoning10
  • Biological term5
  • Odd one out2
  • Analogy1

Most frequent topics

Mutation 4Law of Dominance 3Dihybrid cross — F1 generation 3Gametes of a dihybrid 3Dihybrid F2 phenotypic ratio 3Genetic disorders vs infectious diseases 2Allele 2Recessive allele 2
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Showing 12 of 62 matching questions (62 marks).

12 questions

7(a)

In a homozygous pea plant, axial flowers (A) are dominant over terminal flowers (a).

1(c)

In each set of terms given below, there is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd term in each set and name the category to which the remaining three belong. Example: Ovary, Fallopian tube, Ureter, Uterus. Odd term: Ureter. Category: Parts of female reproductive system.

4(b)

Give the Biological / technical term for the following:

5(b)

Give scientific reasons for the following statements:

6(a)

The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow:

Figure for this question
7(a)

A homozygous tall plant (T) bearing red coloured (R) flowers is crossed with a homozygous dwarf (t) plant bearing white (r) flowers: