The diagrams below represent different phases of meiosis in an organism - NSC Life Sciences - Question 2 - 2019 - Paper 1
Question 2
The diagrams below represent different phases of meiosis in an organism.
(a) A
(b) B
(c) C
2.1.2 Identify the phase represented in DIAGRAM 3.
2.1.3 Write down the... show full transcript
Worked Solution & Example Answer:The diagrams below represent different phases of meiosis in an organism - NSC Life Sciences - Question 2 - 2019 - Paper 1
Step 1
Identify: (a) A
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Answer
A represents the structure known as the centromere, which is the region of a chromosome where the two sister chromatids are joined together.
Step 2
Identify: (b) B
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Answer
B represents homologous chromosomes, which are pairs of chromosomes, one from each parent, that have similar structure and gene sequences.
Step 3
Identify: (c) C
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Answer
C represents spindle fibers (or spindle threads), which are structures that assist in the segregation of chromosomes during cell division.
Step 4
Identify the phase represented in DIAGRAM 3
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Answer
DIAGRAM 3 represents the phase of Anaphase II, where sister chromatids are pulled apart to opposite poles of the cell.
Step 5
Write down the numbers of the diagrams to show the sequence in which the phases occur
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Answer
The sequence of the diagrams in the order of their occurrence is 2, 1, 3.
Step 6
State ONE difference between metaphase I and metaphase II
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Answer
In metaphase I, the chromosomes arrange at the equator in homologous pairs, whereas in metaphase II, the chromosomes align at the equator individually.
