3) In 1998 in a forest there are 300 bald eagles, 200 have dark brown head feathers, and 100 have light brown head feathers. In 2014 there are 20 bald eagles in the same forest, 17 of which have dark brown feathers. Dark head feathers are dominant to light head feathers. Calculate the allele frequencies in 1998 and in 2014. a) Is evolution occurring? What do you believe is the main cause? Explain. b) Calculate the number of homozygous dominant bald eagles in 2014.
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.
3) In 1998 in a forest there are 300 bald eagles, 200 have dark brown head feathers, and 100 have light brown head feathers. In 2014 there are 20 bald eagles in the same forest, 17 of which have dark brown feathers. Dark head feathers are dominant to light head feathers. Calculate the allele frequencies in 1998 and in 2014. a) Is evolution occurring? What do you believe is the main cause? Explain. b) Calculate the number of homozygous dominant bald eagles in 2014.
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