Question

blastocyst
cardiac cells
stem cell
fat cells
neuron
red blood cells
epithelial cells
which two statements are true of the cells formed from the stem cell in the model?
□ they all have the same dna.
□ the cells are all single - celled organisms.
□ different dna causes them to have unique functions.
□ gene expression causes the cells to have specialized functions.
□ mutations that occur during replication make the cells look different.

Explanation:

1. Analyze "They all have the same DNA": Stem cells differentiate into various cell types (cardiac, fat, etc.) through mitosis, so daughter cells have the same DNA. This is true.
2. Analyze "The cells are all single - celled organisms": The cells (like cardiac, epithelial) are part of a multicellular organism, not single - celled organisms. This is false.
3. Analyze "Different DNA causes them to have unique functions": Differentiated cells from a stem cell have the same DNA. Different functions come from gene expression, not different DNA. This is false.
4. Analyze "Gene expression causes the cells to have specialized functions": During differentiation, different genes are expressed in different cells, leading to specialized functions (e.g., cardiac cells for contraction, neurons for signaling). This is true.
5. Analyze "Mutations that occur during replication make the cells look different": Cell differentiation (not replication - related mutations) is the main reason for different cell appearances/functions. This is false.

Answer:

• They all have the same DNA.
• Gene expression causes the cells to have specialized functions.