Question

unit 2.3 cell cycle, mitosis, meiosis quiz 2025 - 26
all the cells in the human body originated from one fertilized cell. briefly explain how they become so differentiated even though they have the same dna?

Explanation:

All human cells start from a fertilized egg with the same DNA. Differentiation occurs through gene - regulation. Certain genes are turned on or off in different cell - types. This is influenced by internal and external signals. For example, transcription factors bind to specific DNA regions and control gene expression, leading to the development of different cell types like muscle, nerve, and skin cells.

Answer:

All human cells originate from a fertilized cell with identical DNA. Differentiation occurs via gene - regulation, where specific genes are activated or inactivated in response to internal and external signals, such as the action of transcription factors binding to DNA and controlling gene expression, resulting in diverse cell types.