Question

What happens during development when only certain genes are expressed in certain cells?

a. The cells have become mutated, so if the organism lives, it cannot function normally.

b. The cells can only perform certain functions and only pass the genes for those functions to their daughter cells.

c. The cells differentiate into type of tissues and organs specialized for their functions.

d. The cells cannot perform all of the functions necessary for life, and they die.

Answer 1

during development when only certain genes are expressed in certain cells: Option B. The cells can only perform certain functions and only pass the genes for those functions to their daughter cells.
Gene regulation can occur at any point during the gene expression, but most commonly it occurs at the level of transcription, when the information in a gene's DNA is transferred to mRNA. Signals from the environment or from other cells activate proteins called transcription factors.
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