both male and female rats have genotype bb. based on the punnett square, carol concluded that the phenotypic ratio of the monohybrid cross is 2: 1: 1. what mistake did carol make?
a) the ratio should be 2: 1
b) the ratio should be 3: 1
c) the ratio should be 2: 1: 1
d) the ratio should be 1: 1: 1:

B) The ratio should be 3:1

Explanation: The genotypes of the offsprings from a monohybrid cross between a male and female rat with genotype Bb will produce 2 Bb, 1 BB and 1 bb. Phenotypically, Bb and BB will manifest outwardly as dominant while Bb will appear as recessive trait. Therefore, the phenotypic ratio is 3:1

See the attached punnet for the cross