We are interested in determining whether scale traits for th

We are interested in determining whether scale traits for the Rio Grande Horned Toad follow a common epistatic relationship. The observed phenotypes are scaled and fused. Which mode of inheritance would mostlikely explain the data below?

Phenotype

Scaled 122

Fused 98

Total 220

Select One:

dominant/recessive epistasis

deuplicate dominant epistasis

duplicate genes with cumulative effect

single dominant epistasis

single resessive epistasis

duplicate recessive epistasis

Solution

The correct answer is :dominant/recessive epistasis.

Reason: In this case,dominant allele in both homozygous and heterozygous conditions and recessive allele in homozygous condition at each defined locus will give rise to same effect i.e scaled phenotype while other genotypes will produce fused phenotype.