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.
Unique Baby Boy Names Unique baby names for boys are more widely used now than ever before. Fifty years ago, the Top 20 boys' names represented 41% of all male children; by contrast in 2015, the Top 20 boys' names represented only 14% of all baby boys.