The diagram shows an early stage in the development of a human embryo - Scottish Highers Human Biology - Question 1 - 2019
Question 1
The diagram shows an early stage in the development of a human embryo.
(a) (i) The embryonic stem cells shown can differentiate into all body cell types.
State the ... show full transcript
Worked Solution & Example Answer:The diagram shows an early stage in the development of a human embryo - Scottish Highers Human Biology - Question 1 - 2019
Step 1
State the term that describes this feature of these cells.
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Answer
Pluripotent
Step 2
Explain why embryonic stem cells can differentiate into all cell types.
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Answer
Embryonic stem cells have the ability to express all genes related to cell differentiation. This means that no genes are switched off, allowing these cells to develop into any type of cell in the body.
Step 3
State the number of chromosomes in the nuclei of cells produced when germline stem cells divide by meiosis.
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Answer
23
Step 4
State one way in which stem cells are used in research.
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Answer
To study diseases/ genetic disorders/ drug testing.
Step 5
Suggest why this is an advantage from an ethical viewpoint.
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Answer
Embryos do not need to be used or destroyed, which means that their potential life does not have to be ended or destroyed.
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