Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. What are the expected proportions of the following progeny?

A–B–ccdd

Key Concepts

Genotype

A genotype refers to the genetic constitution of an organism, represented by the alleles it possesses for a particular gene. In this case, the genotypes AABbCcDd and AaBbCcDd indicate the specific alleles for four different genes. Understanding how these alleles combine during reproduction is crucial for predicting the offspring's traits.

Punnett Square

A Punnett square is a diagram used to predict the genetic outcomes of a cross between two organisms. It allows for the visualization of how alleles from each parent combine to form the genotypes of the offspring. By filling out a Punnett square for the given genotypes, one can determine the expected proportions of various progeny genotypes, including A–B–ccdd.

Independent Assortment

Independent assortment is a principle of genetics stating that alleles for different genes segregate independently of one another during gamete formation. This means that the inheritance of one trait generally does not affect the inheritance of another. In the context of the given genotypes, this principle helps in calculating the probabilities of specific combinations of traits in the progeny.