*Genes A and B are linked. Individual plants homozygous for different combinations of these genes (AABB, aabb, AAbb, aaBB) were crossed at random to produce Fi plants. The Fi plants were self pollinated to produce the F2. The F2 progeny from six of the F₁ self pollinations are listed below. F₁ Plant 1 2 3 4 S 6 2. 3. Number of F₂ plants in each phenotypic class AB Ab aB 98 4. 64 106 50 99 10 34 25 8 104 23 31 ab 32 18 a. Determine the genotype of the F₁ that produced each F2 population. 1. 36 2 5. 6. b. Calculate the recombination frequency between genes A and B. I
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.
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