AP Biologyeasymcq1 pt
Cell specialization (a muscle vs a neuron) results primarily from
A.differential gene expression
B.different DNA sequences per cell type
C.loss of unneeded genes
D.random chromosome loss
Explanation
Core Concept
Most differentiated somatic cells in an organism contain essentially the same inherited genome but express different subsets of genes, producing different proteins and cellular functions. There are biological exceptions, including programmed DNA rearrangements in some immune cells and cells such as mature mammalian red blood cells that lose their nucleus, so 'all cells share the same genome' is a useful simplification rather than an absolute.
Correct Answer
Adifferential gene expression
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