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Why are most deadly diseases caused recessive alleles?

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Jarrod Robel
Jarrod RobelLv2
29 Sep 2019
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Related questions

A. Compare/contrast/discuss gain of function mutations and lossof function mutations

B. For loss of function recessive diseases, the severity dependsupon the residual activity/level of gene

expression of the two present alleles. Discuss

and phenotype (i.e., simple recessive, etc.)

Most common diseases caused by mycosis infections

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 Ć¢Ā€ĀœEĆ¢Ā€Ā represent the normal enzyme. Also in humans in a condition called galactose intolerance or galactosemia, which is also caused by a recessive allele. Let Ć¢Ā€ĀœGĆ¢Ā€Ā 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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