Question

25 POINTS PLEASE HURRY

What type of monohybrid cross produces the following phenotypic ratio and percentages?



3:1; 75 percent; 25 percent.



State it in terms of the genotype for one parent crossed with the genotype of the second parent.

Answer 1

A monohybrid cross producing a 3:1 phenotypic ratio and percentages of 75 percent dominant to 25 percent recessive is a cross between two heterozygous parents, represented as Pp x Pp.

Step-by-step explanation:

The phenotypic ratio of 3:1, where 75 percent of the offspring show the dominant phenotype and 25 percent show the recessive phenotype, refers to a monohybrid cross between two heterozygous parents for a given trait. In terms of genotype, this cross would be represented as Pp (heterozygous dominant) crossed with Pp (heterozygous dominant).

When using a Punnett square to represent this cross, it would result in offspring genotypes of PP (homozygous dominant), Pp/pP (heterozygous dominant), and pp (homozygous recessive), leading to the phenotypic ratio where those with at least one dominant allele (P) show the dominant phenotype, resulting in 75 percent, whereas those with two recessive alleles (pp) show the recessive phenotype, resulting in 25 percent.