Skip to main content
O-LevelBiologyGenetics & Variation5090/11 · Oct/Nov 2013 · Q391 Mark

The allele for white flowers is recessive to the allele for red flowers. Which statement is not correct?

AAn allele for red in the genotype will always be seen in the phenotype.
BCrossing two heterozygotes will produce an approximate 3:1 ratio.
CRed flowers are always heterozygous.
DWhite flowers are always homozygous.

✓ Correct answer

C: Red flowers are always heterozygous.

Practise more questions on this topic

Oracle Prep sorts past-paper questions by topic, so you can drill Genetics & Variation and see which topics are most likely to come up next.

Sign up free →

About this question

Topic
Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2013 Paper 1 Variant 1, question 39.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Related Biology questions

© 2026 Oracle Prep