Question

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which genes are present in the liver cells?
o liver cells do not require any genes.
o half the number of genes is present in the liver cells.
o all the genes are present in the liver cells.
o only the genes needed by the liver cells are present in those cells.

Explanation:

In multicellular organisms, all somatic cells (including liver cells) contain the full set of genes. Gene expression (which genes are turned on or off) determines the cell's function, not the presence of genes. Liver cells do require genes (they need to carry out functions like metabolism, which is gene - regulated). Half the number of genes would be the case for gametes (not somatic liver cells). And it's not that only needed genes are present; all genes are present, but only some are expressed.

Answer:

All the genes are present in the liver cells.