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.)

  1. 10
  2. 20
  3. 40
  4. 80
Distribution of Responses
Chart showing distrubtion of responses for Item RH006003
Students Responding Correctly
Group Correct Total Percent
Overall 859 1624 53%
Grades
  6–8 481 912 53%
  9–12 378 712 53%
Gender
  Male41075554%
  Female43183052%
Primary Language
  English754141053%
  Other8717350%

View data table