What are genes called that exist in more than one form? What is the dominant version of the gene called; what is the recessive version called? Give an example of these two forms from Mendel's pea experiments.
Genes that exist in more than one form are called alleles. The allele that always expresses its version of a character is termed the dominant allele while the other allele is termed the recessive allele. In Mendel's peas, for example, the allele for green pods was the dominant allele while the allele for yellow pods was the recessive allele.