Complementation – Cross 1 making the heterozygous males Male Parent genotype Hermaphrodite Parent genotype X Female gametes Male gametes Progeny genotype Progeny phenotypes and ratios

Complementation – mutations in different dpy genes Male Parent genotype Hermaphrodite Parent genotype X Female gametes Male gametes Progeny genotype Progeny phenotypes and ratios WHY might there be some Dpy hermaphrodites?

Complementation – mutations in the same dpy gene Male Parent genotype Hermaphrodite Parent genotype X Female gametes Male gametes Progeny genotype Progeny phenotypes and ratios Why are we looking for Dpy males when the mutations are in the same gene?

Symbols to Know for Crosses a//a – a is the allele and // represents the chromatids – there are two for a diploid organism – sometimes written as / a b//a b – two different genes on the same chromosome a//a ; b//b – two different genes on different chromosomes X – symbolizes mating between two different individuals X - symbolizes a self cross – when the hermaphrodite worms fertilize their own eggs