redwood, found in northern California. The male cones, which are olved with reproduction, show several phenotypic colors, including yellow, orange, brown, red brown, and green. Through a ries of crossings, these were the data gathered. F, progeny phenotypes Orange Red brown Red brown Brown ure-breeding parents range x Yellow range x Red brown ellow x Red brown rown x Green F₂ progeny phenotypes 29 Orange: 12 Yellow 43 Red brown: 16 Orange 32 Red brown: 10 Yellow 23 Brown: 7 Orange: 2 Green Determine the allelic series for the recessive alleles. • Write down the genotypes of the crosses and F, progeny for ONE cross 1-3 and for cross 4. Explain the pattern observed in cross 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.
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