Two inbred lines of sunflowers (P1 and P2) produce different total weights of seeds per flower head…. Show more Two inbred lines of sunflowers (P1 and P2) produce different total weights of seeds per flower head. The mean weight (in grams) and the variance of seed weights in different generations are listed in the table below. 1. Use the information to determine VG, VE and VP for this trait. 2. Determine H 2 for this trait. Generation Mean Weight/Head (g) Variance P1 105 3.0 P2 135 3.8 F1 122 3.5 F2 125 7.4 •
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.
Two inbred lines of sunflowers (P1 and P2) produce different total weights of seeds per flower head…. Show more Two inbred lines of sunflowers (P1 and P2) produce different total weights of seeds per flower head. The mean weight (in grams) and the variance of seed weights in different generations are listed in the table below. 1. Use the information to determine VG, VE and VP for this trait. 2. Determine H 2 for this trait. Generation Mean Weight/Head (g) Variance P1 105 3.0 P2 135 3.8 F1 122 3.5 F2 125 7.4 •
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