what does heterozygous mean
the alleles are different
what does homozygous dominant mean
when both alleles are dominant
what does homozygous recessive mean
when both alleles are recessive
what does phenotype mean
what the organism looks like
what does genotype mean
the alleles in an organism
what is an allele
different forms of the same gene
what does the gene mean
a section of a DNA that codes for a particular protein
what is the nucleotide
building blocks of DNA