Question

how did mendel predict the traits would be produced in a dihybrid cross?

in random proportions

in unequal proportions

in equal proportions

Explanation:

Mendel's dihybrid cross experiments led him to formulate the law of independent assortment. In a dihybrid cross (e.g., \(AaBb\times AaBb\)), the alleles of different genes assort independently during gamete formation. When calculating the phenotypic ratios of the offspring, using the Punnett - square method or the multiplication rule (for probability), we find that the phenotypic ratio is \(9:3:3:1\). This ratio shows that the traits are not produced in equal proportions (a \(1:1:1:1\) ratio would be equal) and not in completely random proportions (there is a definite mathematical relationship based on Mendelian genetics). The \(9:3:3:1\) ratio implies that the traits are produced in unequal proportions.

Answer:

in unequal proportions