This model shows a human embryo. what can you determine about its development from the model? it has a postanal tail. it’s a vertebrate it has pharyngeal arches. it has fully developed organ systems.

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