How might reduced enzyme function lead to disease?

1 answer:

4 0

When there is a mutation in a gene that produces an enzyme, it can cause disease. Phenylketonuria or PKU is a rare inherited disorder that causes the build up of phenylalanine. This can lead to brain damage in individuals with this disorder if they don't eat a very protein-- restricted diet. The gene mutation doesn't allow the creation of the enzymeneeded to break down Phenylalanine, an amino acid in proteins.

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The genotype is $X^BX^b : X^bX^b : X^BY : X^bY$ ( Calico : Black : Black : orange )

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Fur color is a co-dominant sex linked trait in cats.

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Male black cat = XᵇY

Female Calico cat = XBXᵇ

The cross performed is shown in the table attached:

According to the cross:

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