Consider the following statement in all cases in which resea

Consider the following statement: \"in all cases in which researchers using genome-wide association methods have identified a locus as causal for a phenotype, a selective sweep had to have occurred at that locus in the history of the population.\" Is this statement true or false and why?

Solution

The statement is true.

Explanation: In history, many alleles of a gene are formed due to mutations and variations. Now, one of these alleles will have higher fitness, and will favor that population in which it is present. So, in future, that allele will become fixed in this population. This is known as selective sweep. So, all loci identified in genome-wide association methods had been formed via selective sweep in the past.