The diagram below represents one cell in a phase of meiosis - NSC Life Sciences - Question 2 - 2022 - Paper 2
Question 2
The diagram below represents one cell in a phase of meiosis.
2.1.1 Identify the phase of meiosis shown.
2.1.2 Give ONE observable reason for your answer to QUESTI... show full transcript
Worked Solution & Example Answer:The diagram below represents one cell in a phase of meiosis - NSC Life Sciences - Question 2 - 2022 - Paper 2
Step 1
Identify the phase of meiosis shown.
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Answer
The phase of meiosis shown in the diagram is Metaphase II. This is evident as the chromosomes are aligned at the equatorial plane of the cell.
Step 2
Give ONE observable reason for your answer to QUESTION 2.1.1.
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Answer
In Metaphase II, individual chromosomes line up at the equator of the cell, which is characteristic of this stage.
Step 3
(a) A
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Answer
The structure labeled A is the cell membrane.
Step 4
(b) B
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The structure labeled B is the spindle fiber.
Step 5
Describe the role of part B in the movement of chromosomes during meiosis.
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Answer
Part B, the spindle fibers, play a crucial role in the movement of chromosomes during meiosis. They contract and shorten to pull the chromosomes or daughter chromatids toward opposite poles of the cell, ensuring an equal distribution of genetic material into the daughter cells.
Step 6
Draw a labelled diagram of structure C as it would appear in the final phase of this meiotic division. Show the correct shading.
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Answer
In the final phase of meiosis (Telophase II), structure C represents the unreplicated daughter chromosomes/chromatids. Each chromosome should be depicted as a single chromatids with a centromere, ensuring that at least one of the chromatids is shaded while the others may remain unshaded.
