protein		a change in DNA caused by a mutagen
trait		when DNA makes a copy of itself
homozygous		a single strand copy of DNA
recessive traits		where both allele are either dominant or recessive
plasmid		number and appearance of chromosomes in the nucleus
nucleotide		an observable trait of an organism
melanin		pigment that creates skin, hair, and eye coloring
phenotype		genes that determine body pattern and symmetry
RNA		another term for heterozygous, produced by the mating of tho different varieties of a species
homeotic		complex molecule made up of amino acids
hybrid		the base and spine of a DNA
mutations		characteristics of an organism
law of dominance		an allele that is expressed only when it is paired with a recessive trait
mutagens		things that cause mutations
replication		only dominant trait is expressed
karyotype		double stranded and often circular; found in bacteria