Template for Crosses Female Parent Male Parent genotype genotype X Female gametes Male gametes F1 Progeny genotype and ratios F1 Progeny phenotypes Which progeny are you continuing with? Why?

F1 parent X self cross F1 gametes students can show Punnet Square F2 Progeny genotype F2 Progeny phenotypes and ratios

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