When two individuals who are heterozygous for a gene are mated,we would predict a dominant to recessive phenotypic ratio of ________ in the offspring.
A) 1:2:1
B) 1:3
C) 3:1
D) 9:3:3:1

Question

Quizplus · Accepted Answer

When two heterozygous individuals (Aa x Aa) are mated, they can produce three different genotypes: AA, Aa, and aa. The dominant phenotype is expressed in both homozygous dominant (AA) and heterozygous (Aa) individuals, whereas the recessive phenotype is expressed only in homozygous recessive (aa) individuals. Therefore, the predicted phenotypic ratio would be 3:1 (dominant:recessive).

When Two Individuals Who Are Heterozygous for a Gene Are