Name Instructor Course Date Cohort Effects in a Genetically Determined Trait- Eye Color among US Whites. This study aims at explaining the variations in the eye color among the United States white people. According to the study a number of individuals with blue eyes were found to have reduced significantly as such genetically determined trait was described as ancestry inherited and age-related differences. It was initially believed that blue eye color is inherited in a specific similar pattern as a single recessive trait like that of handedness or hair color. An individual's eye color rarely changes after adulthood hence the cohort differences in the prevalence of the blue eye color in a population would be unanticipated as it's a genetically determined trait. The cohort effects may often assumes that period and age effects interact to cause cohort effects. First-order estimates of age-period-cohort effects are often criticized due to their dependence on arbitrary constraints but may be conceptually important for sociological research. Second-order estimates on the other hand can be easily estimated by using the statistics generated by researchers they produce conceptually important results for epidemiological research questions. Blue eye color therefore exhibits clear cohort differences amongst the white population in the United States because clearly people born in a certain age group were found to be possessing the similar trait. Therefore individuals with blue eyes effect have tremendously reduced in number and up to date such effects on eye color are rare because blue eyes were characterized genetically through ancestral distribution geographically. [...]
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