Why is gene regulation necessary in the development of multicellular organisms? use a specific example to support your argument.

Gene regulation refers to the regulation of expression of a particular gene in a cell that is, it increases or decreases the expression of a particular set of genes in a particular cell.  

In multicellular organisms, gene regulation plays a crucial role in cell differentiation and maturation.  

It enables the formation of different types of cells or tissues from a single type of stem cells that is, it enables the formation of a multicellular organism from a single cell zygote.

For example, muscle cells, nerve cell, skin cell et cetera all arise from a single-celled zygote. It is possible due to highly regulated gene expression.

All cells contain the same genetic information (DNA) but different sets of genes are expressed in different specialized cells.