MICROANATOMY

Detailed explanation-1: -Your genes are the instruction manual that makes your body work. Sometimes, one or a few bases of the DNA in a gene can vary between people. This is called a variant. A variant means the gene has slightly different instructions to the usual version.

Detailed explanation-2: -Nucleic acids are thus uniquely capable of directing their own self-replication, allowing them to function as the fundamental informational molecules of the cell. The information carried by DNA and RNA directs the synthesis of specific proteins, which control most cellular activities.

Detailed explanation-3: -Gene regulation is how a cell controls which genes, out of the many genes in its genome, are “turned on” (expressed). Thanks to gene regulation, each cell type in your body has a different set of active genes-despite the fact that almost all the cells of your body contain the exact same DNA.

Detailed explanation-4: -Definition. A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.