Symbols to Know for Crosses a/a – a is the allele and / represents the two chromatids – there are two alleles for a diploid organism a b/a b – two different genes on the same chromosome a/a ; b/b – two different genes on different chromosomes ; designated separate chromosomes X – symbolizes mating between two different individuals X - symbolizes a self cross – when the hermaphrodite worms fertilize their own eggs + is the wild type or non-mutant form of a gene

Series 1: Autosomal Unlinked Male Parent genotype +/+ ; +/+ dpy/dpy; unc/unc Hermaphrodite Parent genotype X Hermaphrodite gametes Male gametes F1 Progeny genotypes F1 Progeny phenotypes and ratios Which progeny are you continuing with? Why?

Series 1: Autosomal Unlinked F1 parent X self cross F1 gametes students can show Punnet Square F2 Progeny genotype F2 Progeny phenotypes and ratios

Series 1: Autosomal Linked Male Parent genotype + + / + + dpy unc/dpy unc Hermaphrodite Parent genotype X Hermaphrodite gametes Male gametes F1 Progeny genotype F1 Progeny phenotypes and ratios Which progeny are you continuing with? Why?

F1 parent X self cross F1 gametes F2 Progeny genotype F2 Progeny phenotypes and ratios

Series 1: One Autosomal, One x-linked gene-1/gene1; x-gene2/x-gene2 Male Parent genotype +/+ ; +/0 X Hermaphrodite Parent genotype Hermaphrodite gametes Male gametes F1 Progeny genotype F1 Progeny phenotypes and ratios With which progeny are you continuing? Why?

Series 1: One Autosomal, One x-linked F1 parent X self cross F1 gametes F2 Progeny genotypes F2 Progeny phenotypes and ratios