CIE iGCSE Co-Ordinated Science B16.3 Monohybrid inheritance Exam Style Questions Paper 1
Question
Purple flower colour is dominant to white flower colour.
Which parents must be crossed to make sure all the offspring have white flowers?
A homozygous dominant × heterozygous
B homozygous dominant × homozygous dominant
C homozygous recessive × heterozygous
D homozygous recessive × homozygous recessive
▶️Answer/Explanation
Ans : D
Question
What is the correct term for an allele that is always expressed in the phenotype if it is present?
(A) dominant
(B) heterozygous
(C) homozygous
(D) recessive
▶Answer/Explanation
Ans : A
Question
Which statement describes a heterozygous genotype?
(A) not pure breeding with two different alleles
(B) not pure breeding with two identical alleles
(C) pure breeding with two different alleles
(D) pure breeding with two identical alleles
▶️Answer/Explanation
Ans: A
Question
Albinism is a genetic condition which results in an absence of pigment in the skin, hair and eyes.
If two black mice produce an albino offspring, which Punnett square shows the correct cross?
▶️Answer/Explanation
Ans: B