Gene interaction and Epistasis Dog ears may either be drooping or erect. In terms of their barking, some always bark, others sometimes bark, and still other are non-barking. Two dogs from the same species but of different phenotypes were used in the cross: P1 phenotype drooping ears & Non-barking X erect ears & sometimes bark P1 genotype AABB aabb F1 phenotype 100% drooping ears & Non-barking F1 genotype AaBb
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.
Gene interaction and Epistasis
Dog ears may either be drooping or erect. In terms of their barking, some always bark, others sometimes bark, and still other are non-barking. Two dogs from the same species but of different
P1 phenotype drooping ears & Non-barking X erect ears & sometimes bark
P1 genotype AABB aabb
F1 phenotype 100% drooping ears & Non-barking
F1 genotype AaBb
Mating the male and female from F1 produced:
F2 phenotypes F2 genotypes
4 drooping ears & non-barking A_B_
1 drooping ears & always bark A_bb
2 erect ears & sometimes bark aaB_ aabb
Using the same alleles, complete the genotype of the individuals in the crosses below. Write your answer on the line provided. NO need to go through the 7-step method because you already know the alleles for each trait.
*Check attached image
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