IB Biology D3.2.5 Dominant & recessive alleles
IB Biology D3.2.5 Dominant & recessive alleles
Practise explaining dominant and recessive inheritance using crosses, family disease contexts, ratios, diagrams and probability questions.
How this is tested
- explain why a recessive allele may be hidden in a heterozygous genotype
- calculate offspring risk from carrier parents or heterozygous dominant crosses
- interpret cross results to decide whether a trait is dominant or recessive