Question

question 2 of 25
how does a cells history affect the genes expressed by the cell?
a. internal and external conditions determine which genes are turned
on or off as the cell develops.
b. before a cell divides, unnecessary genes are removed from its
chromosomes so the new cell will express only the remaining
genes.
c. the genes that are turned on when a cell is developing are the only
genes that will be expressed during the cells life.
d. all of the genes contained in a cell must be expressed as soon as
the cell forms so it can differentiate.

Explanation:

Gene expression is regulated by internal (e.g., signaling pathways) and external (e.g., environmental cues) factors during cell development. Option B is wrong as genes aren't removed before cell division. Option C is incorrect because gene expression can change throughout a cell's life. Option D is false as not all genes are expressed immediately upon cell formation.

Answer:

A. Internal and external conditions determine which genes are turned on or off as the cell develops.