PEDIGREE WORKSHEET ANSWER KEY-1 - PEDIGREE WORKSHEET Remember we are looking at RARE traits(so no one marrying into the pedigree is a carrier AND all in

PEDIGREE WORKSHEET ANSWER KEY-1 - PEDIGREE WORKSHEET...

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PEDIGREE WORKSHEET Remember - we are looking at RARE traits (so no one marrying into the pedigree is a carrier) AND all in GENERATION I could be carriers X-linked recessive REASONING: skips generation afflicted are all male two different dads but same mother suggests likelihood of both dads being a carrier unlikely X-linked dominant REASONING: does NOT skip gen. afflicted dad ALWAYS passes trait to daughters, while afflicted female equally likely to pass to daughter or son A B C D X-linked recessive REASONING: skips generation afflicted are all male in second generation, we know that men marrying into pedigree CANNOT be carriers Y-linked REASONING: does NOT skip gen. afflicted dad ALWAYS passes trait to sons no females ever afflicted
E F G H I autosomal recessive REASONING: skips generation

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