Question

which phenotypic ratio in the \\(f_2\\) generation was always represented when mendel let the \\(f_1\\) generation self-pollinate?

a 3:1
b 2:2
c 1:3
d 4:0

Explanation:

Identify the cross type and parental genotypes

The \(F_1\) generation of Mendel's monohybrid crosses consists of heterozygous individuals (\(Pp\)) displaying the dominant phenotype.

Determine the offspring of self-pollination

Self-pollination of \(F_1\) (\(Pp \times Pp\)) produces \(F_2\) genotypes in a \(1:2:1\) ratio (\(1\ PP : 2\ Pp : 1\ pp\)).

Calculate the phenotypic ratio

The dominant phenotype (\(PP\) and \(Pp\)) and recessive phenotype (\(pp\)) appear in a \(3:1\) ratio.

Answer:

• a 3:1 (Correct answer)
• b 2:2
• c 1:3
• d 4:0