In humans there is a disease called Phenylketonuria PKU which is caused by a recessive...

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In humans there is a disease called Phenylketonuria PKU which is caused by a recessive allele People with this allele have a defective enzyme and cannot break down the amino acid phenylalanine This disease can result in mental retardation or death Let E represent the normal enzyme Also in humans in a condition called galactose intolerance or galactosemia which is also caused by a recessive allele Let G represent the normal allele for galactose digestion In both diseases normal dominates over recessive If two adults were heterozygous for both traits EeGg what are the chances of having a child that is completely normal Has just PKU Has just galactosemia Has both diseases

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