Introduction to Genetics
Phenotype: the physical appearance or trait (ex. tall, short, round, red)
Homozygous: the two alleles for a trait are the same. (ex. HH, hh)
Heterozygous: the two alleles for a trait are different. (Yy, Hh, Tt)
Dominant: the allele that masks or hides the recessive allele (uppercase).
Recessive: the allele that is masked or hidden by the dominant allele (lowercase).