Chapter 18: Genes and Development

Question 1

About how many different types of cells does the human body contain? What cell do they all derive from?

Answer 1

200

• The zygote cell

Question 2

What is Cell Differentiation?

Answer 2

The process in which cells become progressively more specialized as a result of gene regulation

• As cells differentiate along one pathway, they progressively lose their ability to differentiate along other pathways.