Determine whether the statements below are true or false. If a statement is false, provide the correct information or revise the statement to make it correct.

If a dihybrid cross is performed, the expected genotypic ratio is 9:3:3:1.

Key Concepts

Dihybrid Cross

A dihybrid cross is a genetic cross that examines the inheritance of two different traits, each controlled by different genes. In this type of cross, individuals that are heterozygous for both traits are typically used, allowing for the observation of how alleles segregate independently according to Mendel's law of independent assortment.

Genotypic Ratio

The genotypic ratio refers to the relative frequency of different genotypes produced in the offspring from a genetic cross. In a dihybrid cross, the expected genotypic ratio is 1:2:1 for each trait, leading to a combined phenotypic ratio of 9:3:3:1, which describes the expected distribution of phenotypes among the offspring.

Mendel's Laws of Inheritance

Mendel's laws of inheritance, particularly the law of segregation and the law of independent assortment, form the foundation of classical genetics. The law of segregation states that allele pairs separate during gamete formation, while the law of independent assortment states that genes for different traits are inherited independently of one another, which is crucial for predicting outcomes in dihybrid crosses.