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.
Best Answer: Allele, probably. In humans and other sexually reproducing diploid organisms, there are two copies of every gene-one is inherited from the mother and the other is inherited from the father.The two copies are often referred to as alleles.If the two alleles for a given gene are the same the organism is said to be homozygous for that gene; if they are different the organism is said to be heterozygous for that gene. The other way the term allele is used is as an alternate form of a gene.For example, for blood type there are A, B, and O alleles.est Answer: Allele, probably. In humans and other sexually reproducing diploid organisms, there are two copies of every gene-one is inherited from the mother and the other is inherited from the father.