Original Project
Reproduction, Genes, and Heredity
Genetic information in the form of DNA molecules is transferred from parents to offspring during reproduction.
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
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||
|---|---|---|---|---|---|---|---|
| n = 4516 |
6–8 n = 2596 |
9–12 n = 1917 |
Male n = 2215 |
Female n = 2225 |
English n = 4067 |
Other n = 339 |
|
| A. | 23% | 25% | 21% | 22% | 25% | 23% | 25% |
| B. | 23% | 22% | 25% | 23% | 23% | 23% | 21% |
| C. | 46% | 45% | 49% | 46% | 46% | 47% | 42% |
| D. | 7% | 8% | 6% | 8% | 6% | 7% | 12% |