Original Project
Reproduction, Genes, and Heredity
Item RH033002: If the skin cells of a mouse each contain 40 chromosomes, the sperm cells of a mouse contain 20 chromosomes.
Like most animals, mice reproduce sexually. The skin cells of a mouse each contain 40 chromosomes. How many chromosomes does a sperm cell of a male mouse contain?
- 10
- 20
- 40
- 80
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1505 | 2726 | 55% |
| Grades | |||
| 6–8 | 762 | 1509 | 50% |
| 9–12 | 743 | 1214 | 61% |
| Gender | |||
| Male | 696 | 1300 | 54% |
| Female | 778 | 1368 | 57% |
| Primary Language | |||
| English | 1355 | 2411 | 56% |
| Other | 107 | 242 | 44% |