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.
If you are considering a unisex or boy name for your baby girl, check out the below ideas, which we have broken down into unisex names and, for the more adventurous, boy names for girls. These unisex names wonât raise many eyebrows as they are often given to both girls and boys: 1  Cameron.  Taylor.