A bird is flying south at 20 mph. Then the bird turns to go west. The bird is still flying at 20 mph. Did the velocity change?

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