1) 1. What is codominance? a) A. One allele completely masks the effect of the other b) B. Both alleles are expressed equally in the phenotype c) C. The phenotype is a blend of both alleles d) D. Only the recessive allele is expressed 2) 2. Which of the following is an example of codominance? a) A. A flower that is pink because red and white alleles blend b) B. A rabbit with black fur due to a dominant black allele c) C. A person with AB blood type, showing both A and B alleles d) D. A cat with blue eyes due to a recessive blue eye allele 3) 3. In a species of flowers, red petals (R) and white petals (W) are codominant. If a plant inherits the allele for red petals from one parent and the allele for white petals from the other, what will the petals look like? a) A. All petals will be red b) B. All petals will be white c) C. The petals will be a mix of red and white d) D. The petals will be pink 4) 4. In chickens, the allele for black feathers (B) and the allele for white feathers (W) are codominant. What feather color would a chicken have if it has the genotype BW? a) A. Black feathers b) B. White feathers c) C. A mix of black and white feathers (speckled) d) D. Gray feathers 5) 5. In a herd of cattle, what is the possible genotype if the cow has a mix of black and white fur? a) A. BB b) B. WW c) C. BW d) D. Bb

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