The offspring's phenotypic ratio is 9: 3: 3: 1. Normal running speed is a dominant feature in mice. These mice are known as running mice (R). Mice only run in circles due to the recessive characteristic.
Agouti mice are AA or Aa mice. Regardless of the phenotype at the second locus, mice with genotype aa are albino because all pigment formation is suppressed. The B allele (agouti coat) is dominant to the b allele at the second location (black coat).
The ratio that represents the various genotypes of a test cross' offspring is called the genotypic ratio. It depicts the pattern of a family's progeny.
To know more about offspring's phenotypic visit:-
https://brainly.com/question/13561903
#SPJ4
