How Is Gene Expression Regulated? The amounts and types of mRNA molecules in a cell reflect the function of that cell. In fact, thousands of transcripts are produced every second in every cell.

Each gene codes for a particular sequence of amino acids in order to make a specific protein. It is the unit of heredity, and may be copied and passed on to the next generation. The diagram shows ...

When only one allele of a gene is actively transcribed, gene expression is termed monoallelic. What does monoallelic gene expression have to do with cats, twins, and genetic diseases? Therefore ...