Income Exclusion Rule. DEFINITION of 'Income Exclusion Rule'. A rule that sets aside certain types of income as nontaxable. There are many types of income that qualify under this rule, such as life insurance death benefit proceeds, child support, welfare and municipal bond income. Income that is excluded is not reported anywhere on Form 1040.
Ancestral vs derived alleles. An ancestral allele or an ancestral trait (depending on whether you look at the phenotype or a t the genotype) is the trait/allele that was carried by the common ancestor of the taxon you consider.
So for instance-Considering all the alleles of a population, your Gene Pool would be K, k, M, and m your allele frequency might be .14K (14%), .30k (30%), .26M (26%), and .30m (30%) So the gene pool is how many of the alleles are present and the allele frequency is how much of each allele is present. Source(s):nswers. Best Answer: A gene pool is the complete set of unique alleles in a population or species. It's literally the sum of all of the allele frequencies within that group.