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Download Series 1: Autosomal Unlinked
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Symbols to Know for Crosses • a/a – a is an allele (gene) and / separates the two genes (alleles), one found on each of two paired chromosomes – Note that there are two alleles for each trait in a diploid organism • a b/a b – two different genes on the same chromosome • a/a ; b/b – two different genes on different chromosomes ; designates 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 X Male gametes Hermaphrodite Parent genotype Hermaphrodite 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 should show Punnet Square F2 Progeny genotype F2 Progeny phenotypes and ratios Series 1: Autosomal Linked Male Parent genotype + +/+ + dpy unc/dpy unc X Male gametes Hermaphrodite Parent genotype Hermaphrodite gametes F1 Progeny genotype F1 Progeny phenotypes and ratios With which progeny are you continuing? Why? F1 parent X self cross F1 gametes F2 Progeny genotype F2 Progeny phenotypes and ratios Series 1: One Autosomal, One x-linked Male Parent genotype +/+ ; +/0 gene-1/gene1; x-gene2/x-gene2 X Male gametes Hermaphrodite Parent genotype Hermaphrodite 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
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