Chemical reactions within the body sometimes require special proteins called to catalyze a reaction

Individuals do not compete directly for resources, but are prey for the same predator

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked

Color blindness is a recessive trait. the gene for color blindness is on the x-chromosome. the family tree below shows the trait of color blindness. theonly unknown is the father in the first generation.