Questions: Question 5 (5 points) Listen How do cells in a multicellular organism become specialized? A) Gene expression is regulated so that different genes are turned off and on at specific times during development of a multicellular organism. B) Each type of cell in a multicellular organism has slightly different DNA, allowing the different types of cells to specialize. C) Genetic recombination determines which genes are located in each cell within a multicellular organism. D) The genes necessary for different types of cells to function segregate into different cell types in a multicellular organism.

Question 5 (5 points) Listen How do cells in a multicellular organism become specialized? A) Gene expression is regulated so that different genes are turned off and on at specific times during development of a multicellular organism. B) Each type of cell in a multicellular organism has slightly different DNA, allowing the different types of cells to specialize. C) Genetic recombination determines which genes are located in each cell within a multicellular organism. D) The genes necessary for different types of cells to function segregate into different cell types in a multicellular organism.
Transcript text: Question 5 (5 points) Listen How do cells in a multicellular organism become specialized? A) Gene expression is regulated so that different genes are turned off and on at specific times during development of a multicellular organism. B) Each type of cell in a multicellular organism has slightly different DNA, allowing the different types of cells to specialize. C) Genetic recombination determines which genes are located in each cell within a multicellular organism. D) The genes necessary for different types of cells to function segregate into different cell types in a multicellular organism.
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Solution

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The answer is A: Gene expression is regulated so that different genes are turned off and on at specific times during development of a multicellular organism.

Explanation for each option:

A) Gene expression is regulated so that different genes are turned off and on at specific times during development of a multicellular organism.

  • This is the correct answer. In multicellular organisms, cells become specialized through the regulation of gene expression. Different genes are activated or deactivated in different cell types, allowing them to perform specific functions.

B) Each type of cell in a multicellular organism has slightly different DNA, allowing the different types of cells to specialize.

  • This is incorrect. All cells in a multicellular organism typically have the same DNA. Specialization occurs due to differences in gene expression, not differences in DNA sequence.

C) Genetic recombination determines which genes are located in each cell within a multicellular organism.

  • This is incorrect. Genetic recombination occurs during the formation of gametes and does not play a role in determining gene location in somatic cells of a multicellular organism.

D) The genes necessary for different types of cells to function segregate into different cell types in a multicellular organism.

  • This is incorrect. Genes do not segregate into different cell types. Instead, all cells contain the same set of genes, but only specific genes are expressed in each cell type.

In summary, cell specialization in multicellular organisms is primarily achieved through the regulation of gene expression, as described in option A.

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