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.
But in my family, Sydney will forever be a boy's name, because it was just and only that until about 1970. (Most likely Sydney Penny was a big reason for the shoot-up in female popularity). Besides, last time I checked, Sydney Carton in a Tale of Two Cities (from 1859) is a BOY, not a girl.