Biology · Grades 9–12
Diploid to haploid
In the stated standard model, meiosis reduces two chromosome sets to one. Do not substitute a universal species count.
Rule and assumptions
In the stated standard model, meiosis reduces two chromosome sets to one. Do not substitute a universal species count.
haploid chromosome count = diploid count/2
Worked examples
A fictional diploid organism has 112 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.
haploid chromosome count = diploid count/2 112/2 = 56
56
A fictional diploid organism has 30 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.
haploid chromosome count = diploid count/2 30/2 = 15
15
Try two questions
A fictional diploid organism has 84 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.
A fictional diploid organism has 96 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.
Answers and reasoning
Answers and marking notes
- 42
haploid chromosome count = diploid count/2 84/2 = 42
- 48
haploid chromosome count = diploid count/2 96/2 = 48
Further reading and review references
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Learning preview · independent educational and translation review required. Suggested grades are not official curriculum alignment.