Exclusion is a method used to: ((MCAER 2014))

✅Explanation: Johannsen, a Danish geneticist, coined the terms "phenotype" and "genotype" to differentiate between an organism's observable traits (phenotype) and its genetic makeup (genotype). His work helped clarify the relationship between genes and their expression.

🔑Key Points:
-The term phenotype refers to the observable physical properties of an organism, these include the organism's appearance, development, and behavior.
-An organism's phenotype is determined by its genotype, which is the set of genes the organism carries, as well as by environmental influences upon these genes.
-Due to the influence of environmental factors, organisms with identical genotypes, such as identical twins, ultimately express nonidentical phenotypes because each organism encounters unique environmental influences as it develops.
-Examples of phenotypes include height, wing length, and hair color. 
🛑Additional Information: 

✏Genotype:
-​A genotype is an individual's collection of genes.
-The genotype is expressed when the information encoded in the genes' DNA is used to make protein and RNA molecules.

✏Monotype:
-A monotypic species is one that does not include subspecies or smaller, infraspecific taxa.
-a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described.