Biology 0610 · IGCSE · Monohybrid inheritance

Monohybrid inheritance — practice question

Fig. 9.1 illustrates a genetic cross between a purple-flowered plant and a white-flowered plant. The parts of the cross are labelled U-Z.
(a(i))[1]

Use the letters U, V, W, X, Y or Z from Fig. 9.1 to answer the questions. Any letter may be used once, more than once, or not at all. State which letter shows the genotype of a heterozygous parent.

(a(ii))[1]

State which letter shows a gamete.

(a(iii))[1]

State which letter shows the phenotype of an individual.

(a(iv))[1]

State which letter represents a pure-breeding offspring.

(b)[1]

State the ratio of purple flowers to white flowers produced by this cross.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: the letter V

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