Definition of Dominant Trait. Before we can define exactly what a dominant trait is, we must first define and discuss many genetics terms. A gene, or unit of heredity, can have many different versions called alleles. There are often two kinds of alleles: Dominant allele: masks the effects of another allele; designated by an uppercase letter ; Recessive allele: effects are hidden by a dominant allele; designated by a lowercase letter ; Normally, individuals have two alleles for one gene: one from their mom and one from their dad.
Sydney is mostly a girls' name, but it is used for boys 4.31 percent of the time.
For other uses of Sidney or Sydney, see Sidney (disambiguation) and Sydney (disambiguation). Sidney or Sydney is an English surname. It is probably derived from an Anglo-Saxon locational name, [Ã¦t Ã¾Ç£re] sÄ«dan Ä«ege = [at the] wide island/watermeadow (in the dative case). There is also a folk etymological derivation from the French place name Saint-Denis.