Etymology
Meaning
Origin
The term "genotype" was first coined by Wilhelm Johannsen in 1909 to distinguish between the genetic makeup of an organism and its observable traits (phenotype). Johannsen recognized that the genetic information passed down from parents to offspring is different from the visible characteristics of the offspring.
He used the term "genotype" to refer to the genetic makeup or inheritance of an individual, while "phenotype" referred to the observable characteristics of that individual. This distinction became a fundamental concept in genetics, allowing for the study of the relationship between genes and traits.
The word "genotype" has since been expanded to refer to the genetic makeup of a population or a species as a whole. It is often used to describe the distribution of different alleles (alternative forms of a gene) within a population and how these alleles contribute to the variation in observable traits.
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