help asap pls The pedigree in the figure shows the transmission of a trait through three generations of a family. Based on the pattern of transmission, if the mother does not exhibit the trait, then the offspring.

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