Final answer:
The offspring from a cross between a black (BB) chicken and a gray (BW) chicken have a genotype ratio of 1:1 for black (BB) and gray (BW), and the phenotype ratio is also 1:1 for black and gray chickens due to incomplete dominance.
Step-by-step explanation:
The genotype ratio of the offspring from a cross between a black (BB) chicken and a gray (BW) chicken, considering incomplete dominance, is 1:1, where 50% are black (BB) and 50% are gray (BW). The phenotype ratio is likewise 1:1, with 50% black chickens and 50% gray chickens. This occurs because the BB genotype expresses the black phenotype while the BW genotype expresses the gray phenotype due to incomplete dominance where the heterozygous state results in an intermediate phenotype rather than complete dominance of one allele.
In this cross between a black (BB) chicken and a gray (BW) chicken, the gene for color exhibits incomplete dominance, resulting in the production of black, white, and gray chickens. The genotype ratio of the offspring will be 1:2:1. This means that 25% of the offspring will have the genotype BB (black), 25% will have the genotype BW (gray), and 50% will have the genotype WW (white).
The phenotype ratio of the offspring will be 1:2:1 as well. This means that 25% of the offspring will have the phenotype of black chickens, 25% will have the phenotype of gray chickens, and 50% will have the phenotype of white chickens.