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.
Sydney is a somewhat prominent first name for males (#848 out of 1220, Top 69%) and an even more prominent surname for all people (#35797 out of 150436, Top 24%). (2000 U.S. Census). Charted below is the birth name popularity of Sydney for boys.