BRAINCAKECodominance Genetic Crosses
Genetic crosses with codominant alleles are set out in the same way as other monohybrid crosses, but the heterozygote has its own phenotype.
Worked example 1: two roan shorthorn cattle are crossed. Red is CR and white is CW.
Parental phenotypes: roan × roan
Parental genotypes: CRCW × CRCW
Gametes: CR or CW from each parent
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Key terms in this lesson
- codominance
- A type of inheritance in which two different alleles of a gene are both expressed in the phenotype of a heterozygote, rather than one masking the other.
More in Genetics and Variation
- Species
- Allopatric Speciation
- Sympatric Speciation
- Artificial Selection
- Codominance
- Multiple Alleles
- Multiple Allele Crosses - ABO Blood Groups
- Autosomal Linkage and Recombinant Offspring
All 41 lessons in Genetics and Variation · All OCR A-level Biology topics