Punnett Square, A way of showing a genetic diagram., What is an allele?, A different version of a gene, What is co-dominance?, Both alleles are expressed in the phenotype, What is a phenotype?, The expression of a gene, What is an autosome?, Any chromosome that isn't a sex chromosome, What is an epistatic gene?, It masks the expression of another gene, When do you use a dihybrid cross?, When you want to look at two different genes that are inherited at the same time

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