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.
Some names are names for either sex, but you can usually tell which based on the spelling, again think Sidney (boy) and Sydney (girl). A good example would be Ashley. There are also names that you really can't guess unless you're changing the child's diaper or they have a middle name that is extremely male or female.