Original Project
Reproduction, Genes, and Heredity
Genetic information in the form of DNA molecules is transferred from parents to offspring during reproduction.
Item RH006003: If the sex cells in mice contain 20 chromosomes, then the fertilized egg cell of a mouse contains 40 chromosomes.
Sex cells (sperm or egg cells) in mice contain 20 chromosomes. How many chromosomes does the fertilized egg cell of a mouse contain? (A fertilized egg cell is an egg cell that has combined with a sperm cell.)
- 10
- 20
- 40
- 80
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 859 | 1624 | 53% |
| Grades | |||
| 6–8 | 481 | 912 | 53% |
| 9–12 | 378 | 712 | 53% |
| Gender | |||
| Male | 410 | 755 | 54% |
| Female | 431 | 830 | 52% |
| Primary Language | |||
| English | 754 | 1410 | 53% |
| Other | 87 | 173 | 50% |