IB Biology HL 3.1.6 Chromosome Numbers
Practise IB Biology HL 3.1.6 by evaluating chromosome-number change through fusion, fission, polyploidy and non-disjunction.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Explain how fusion, fission, polyploidy and non-disjunction can change chromosome numbers between species.
- Distinguish haploid and diploid cells and evaluate chromosome-number evidence across species.
A3.1.6—Diversity in chromosome numbers question 1
[Maximum number: 1]
The diploid number of chromosomes in humans (Homo sapiens) is 46 and the diploid number of chromosomes in rice (Oryza sativa) is 24 . What does this indicate about diploid chromosome numbers?
A
Plant species have a lower diploid number of chromosomes than animals.
B
Members of a species have the same diploid number of chromosomes.
C
The evolutionary progress of species is determined by the diploid number of chromosomes.
D
The complexity of the organisms is correlated to the diploid number of chromosomes.
B
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