Biology 0610 · IGCSE · Monohybrid inheritance

Monohybrid inheritance — practice question

A single gene determines coat texture inheritance in guinea pigs.
(a)[2]

Define gene.

(b(i))[1]

State how many guinea pigs in Fig. 3.2 have smooth coats.

(b(ii))[1]

State the letter for a guinea pig with a homozygous dominant genotype in Fig. 3.2.

(b(iii))[1]

State how many male guinea pigs are shown in Fig. 3.2.

(c)[3]

Complete Fig. 3.3 by showing the possible offspring genotypes from this cross and the likelihood that the offspring will have a smooth coat.

(d)[1]

Complete the sentence about breeding. When two identical homozygous individuals breed together, they will be [BLANK]-breeding.

Worked solution & mark scheme

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