Q18 · Practice questionSimple familiar1 mark
QUESTION 18
A diploid animal has 12 chromosomes in its somatic cells. At metaphase I of meiosis, one cell contains
(A)
12 chromosomes and 24 chromatids.
(B)
24 chromosomes and 24 chromatids.
(C)
6 chromosomes and 12 chromatids.
(D)
12 chromosomes and 12 chromatids.
WORKED SOLUTION
1 markAnswer A
Answer
A
Working
DNA has replicated before meiosis. Each of the 12 chromosomes consists of two sister chromatids, giving 24 chromatids. Chromosome number is counted by centromeres.
Marking criteria
- Select A. [1 mark]
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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