In house elves, droopy ears is an X-linked recessive trait. Kreacher’s brother, mom and dad all have pointed ears, but Kreacher was born with droopy ears. Kreacher’s maternal grandfather also had droopy ears while his grandmother had normal pointed ears. Kreacher wonders how he ended up with droopy ears like his grandpa.
Indicate the genotypes for Kreacher, his mom, dad, brother, and grandfather. (2.5 marks)
Draw the pedigree for Kreacher’s family. Be sure to label generations. (4.5 marks)
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