CAIE IGCSE Biology EXTENDED 17.4.14 Codominance as a situation in which
CAIE IGCSE Biology EXTENDED 17.4.14 Codominance as a situation in which
Practise recognising codominance in crosses where heterozygotes show both alleles or a different phenotype, using flowers, hair colour and blood groups.
How this is tested
- explain from a heterozygote phenotype why neither allele is dominant or recessive
- interpret crosses for flower or hair colour to identify codominance and offspring percentages
- link ABO blood group AB to both IA and IB alleles being expressed in one phenotype