Four drosphillia's

Drosophila

Multiple Alleles

  • Both alleles are expressed as a dominant phenotype
  • More than two choices of alleles are present for the trait
  • The presence of 3 different alleles allows for there to be 6 Phenotypes
  • Multiple alleles happen in the same character causing different degree of expression
  • No normal diploid animal carries more than two alleles at any one time

Drosophila

  • Normal eye color was originally red
  • The first mutation was white
  • Eye color is a sex-linked gene
  • Eye color is controlled by multiple alleles