(0 - E)2 Phenotype Observed Expected Yellow & Non-starchy seeds 470 (#27) # 29 Yellow & Starchy seeds 140 150 # 30 Brown & Non-starchy seeds 135 (#28) # 31 Brown & Non-starchy seeds (#26) 50 # 32 Total Number of Seeds 800 I (0 - E)2 # 33-34 # 35. What is the df?
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.
The following results came from a dihybrid cross of two rice with yellow non-starchy seeds (YySs). Note that Yellow is dominant over brown and Non-starchy over starchy.
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