homozygous - when the alleles for a trait are the SAME size letters. Ex) HH, AA, bb, cc, heterozygous - when the alleles for a trait are DIFFERENT sized letters. Ex) Hh, Aa, Bb, Cc, genotype - the actual genes present; we use letters to show this. Ex) Bb, BB, bb, phenotype - the actual physical traits present. Ex) brown hair, blue eyes, freckles, dominant - this trait is always expressed; "wins" over the others, recessive - this trait is only expressed when both alleles are present, HH - homozygous dominant genotype, hh - homozygous recessive genotype, Hh - heterozygous (dominant) genotype, Codominance - the type of dominance where the two parents' traits show up together (like co-stars) , Incomplete Dominance - the type of dominance where the offspring have a mixture of the parents traits (red and white makes pink) ,

Genetics Review

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