Regulator gene codes for a lac operon repressor protein.

A body of heterozygous females is mosaic.

Change in the reading frame of Codons.

Produces five enzymes to synthesize the amino acid tryptophan.

Found in mammalian females

Changes a single nucleotide or a single specific codon.

Explains the regulation of gene expression in Prokaryotes.

Is a chromatin remodeling complex.

May be due to transposons or replication errors.

Located outside of the operon and codes for a repressor protein molecule.

How many levels of control of gene activity is there?

Caused by mutagens and carcinogens or environmental factors that alter DNA.

Codes for enzymes of a metabolic pathway and is transcribed as a unit.

Specific DNA sequences that can move within and between chromosomes and can shut down gene activity.

Cpdes for a faulty receptor in the stimulatory pathway.