Terms of Mendelian Genetics

In terms of Mendelian Genetics, discuss the following:  dominant and

recessive traits, phenotype and genotype, homozygous and heterozygous, and alleles.

Dominant and recessive traits exist when a trait has two different forms at the gene level. The trait that first appears or is visibly expressed in the organism is called the dominant trait. The trait that is present at the gene level but is masked and does not show itself in the organism is called the recessive trait.