In some chickens, the gene for feather color is controlled by dominance. The allele for black is B and the allele for white is W. The heterozygous phenotype is known as erminette. What is the genotype for white chickens? A. BB
B. WW
C. BW
D. WX

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

i think this picture will you.