O-LevelBiologyGenetics & Variation5090/11 · May/June 2014 · Q401 Mark
Which statement is always true of dominant alleles?
AThey cannot undergo mutation.
BThey give a greater chance of survival than recessive alleles.
CThey give the same phenotype in heterozygotes and homozygotes.
DThey occur more frequently in the population than recessive alleles.
✓ Correct answer
C: They give the same phenotype in heterozygotes and homozygotes.
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