Original Project
Reproduction, Genes, and Heredity
Item RH054001: If the sex cells of a mouse contain 20 chromosomes, then the fertilized egg of a mouse must contain 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?
- 10
- 20
- 40
- 80
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 2097 | 4516 | 46% |
| Grades | |||
| 6–8 | 1163 | 2596 | 45% |
| 9–12 | 932 | 1917 | 49% |
| Gender | |||
| Male | 1026 | 2215 | 46% |
| Female | 1031 | 2225 | 46% |
| Primary Language | |||
| English | 1899 | 4067 | 47% |
| Other | 141 | 339 | 42% |