If we perform the following cross, AABB x AaBb, how many unique haploid gamete genotypes are possible for both parents combined, and what is the probability of the AAbb genotype in their F1 offspring? (Hint: make a list of all possible gamete genotypes for both parents combined, and count the number of unique genotypes). O 2 gamete gentoypes; Probability of AAbb 0.25 O4 gamete gentoypes; Probability of AAbb = 0.25 O 2 gamete gentoypes; Probability of AAbb = 0.125 O 4 gamete gentoypes; Probability of AAbb = 0.125

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Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.