Final Answer:
A. Incomplete dominance: When neither allele is completely dominant, so the heterozygous genotype produces a blended or intermediate phenotype (e.g., red × white → pink).
B. Codominance: When both alleles are fully expressed in the heterozygous individual, so both traits appear together (e.g., red and white patches, like roan cattle).
3. Genotypes of Roan Cross: Rr × Rr
Phenotypes of Roan Cross: 1 red (RR) : 2 roan (Rr) : 1 white (ww)
4. Phenotypes of Flower Cross: To get only pink or white flowers (no red), one parent must be homozygous recessive (ww, white) and the other heterozygous (Rw, pink). Offspring: 50% pink (Rw), 50% white (ww).
Parent Tip: Review the logic above to help your child master the concept of incomplete dominance worksheet.
