Original Project
Reproduction, Genes, and Heredity
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
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||
|---|---|---|---|---|---|---|---|
| n = 1624 |
6–8 n = 912 |
9–12 n = 712 |
Male n = 755 |
Female n = 830 |
English n = 1410 |
Other n = 173 |
|
| A. | 20% | 20% | 20% | 17% | 22% | 20% | 23% |
| B. | 20% | 19% | 21% | 20% | 20% | 20% | 20% |
| C. | 53% | 53% | 53% | 54% | 52% | 53% | 50% |
| D. | 7% | 8% | 6% | 8% | 6% | 7% | 7% |