Epistasis

• describe epistasis?


  In epistasis the interaction of different loci on the gene, one gene locus affects the other gene locus
• epistasis - what can ONE GENE LOCI DO?

  can either mask or suppress the expression of another gene locus
• when does recessive epistasis occur?

  when the presence of a recessive allele prevents the expression of another allele at a second locus
• What ratio does recessive epistasis give?

  gives the ratio of 9:3:4
• what is dominant epistasis?

  when a dominant allele at one locus completely masks the alleles at a second locus
• what ratio does dominant epistasis give ?

  12:3:1