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.
In a 3 point testcross you determine that the interference is -23. What does this negative interference value indicate?
1. A cross over in one region interferes with additional cross overs in the same region
2. Fewer double cross overs than expected took place on the basis of single crossover frequencies
3. Fewer single crossovers took place than expected
4. More double crossovers than expected took place ont the basis of single crossover frequencies
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