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Complementation – Cross 1 making the heterozygous males Male Parent genotype Male gametes X Hermaphrodite Parent genotype Female gametes Progeny genotype Progeny phenotypes and ratios Complementation – mutations in different dpy genes Male Parent genotype X Male gametes Hermaphrodite Parent genotype Female gametes Progeny genotype Progeny phenotypes and ratios WHY might there be some Dpy hermaphrodites? Complementation – mutations in the same dpy gene Male Parent genotype Male gametes X Hermaphrodite Parent genotype Female 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
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