One Type of Hereditary Mutation That Results in a Defect

question 50

Multiple Choice

One type of hereditary mutation that results in a defect in the enzyme phenylalanine hydroxylase is called

• A)albinism.
• B)Tay-Sachs disease.
• C)phenylketonuria.
• D)muscular dystrophy.
• E)prions disease.

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Definitions:

Recessive Genes

Genes that produce their characteristic phenotype only when their allele is identical and not masked by a dominant allele in a heterozygous pairing.

Epigenetics

The study of heritable changes in gene expression that occur without changes in the DNA sequence, often influenced by environmental factors and lifestyle.

Nuclear Membrane

A double-lipid bilayer that encloses the nucleus in eukaryotic cells, controlling the flow of substances in and out of the nucleus.

Golgi Body

A cellular structure responsible for packaging proteins and lipids into vesicles for transport to other parts of the cell or to the cell surface for secretion.