1) In betta fish, alleles for color are incompletely dominant. Yellow fish have the genotype GG, green fish have the genotype Gg, and blue fish have the genotype gg. Two green betta fish are crossed. What percentage of the offspring is expected to be green? a) 25% b) 50% c) 100% d) 75% e) 0% 2) A cross of a red cow with a white cow produces a roan colored offspring. This type of inheritance is known as...? a) Principle of Dominance b) Sex-Linked Inheritance c) Codominance d) Incomplete Dominance 3) In flowers, there are alleles for red flower color and blue flower color. What would you expect a heterozygote to look like if the trait showed incomplete dominance? a) Purple b) Red c) Blue d) Red and Blue Stripes e) Checkered 4) Roan coloring in cows is an example of codominance. A roan bull is mated with a roan cow. What is the genotypic ratio of the offspring? a) 2CRCR : 2 CRCW  b) 2 CRCW : 2CWCW c) 1 Red: 2 Roan : 1 White d) 1CRCR : 2 CRCW : 1CWCW e) 2 Red: 2 Roan 5) In horses, neither the allele for brown color nor white color is dominant or recessive. When a brown colored horse and a white colored horse are mated, a yellow-tannish colored horse called “palomino” is produced. A horse has the genotype Bb. What is its phenotype? a) Brown b) Palomino c) White d) Bb e) Purple

Incomplete Dominance and Codominance

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