MICROANATOMY

Detailed explanation-1: -The regulation of gene regulation is responsible for phenotypic differences between cells with similar or identical genomes. For example, skin cells differ from hair cells even though they have the same genome because they are found in the same person and because different genes are turned on or off in these cells.

Detailed explanation-2: -The DNA in the skin cells and the DNA in the brain cell have the same base sequence in a particular organism. This base sequence is the same in all the cells of the organism. The change in characters between the cells of the brain and that of skin cells is that the gene expression is different.

Detailed explanation-3: -The genome of a cell contains in its DNA sequence the information to make many thousands of different protein and RNA molecules. A cell typically expresses only a fraction of its genes, and the different types of cells in multicellular organisms arise because different sets of genes are expressed.