Most scientific investigations use some form of the scientific method. Find out more about the scientific method. Science as defined above is sometimes called pure science to differentiate it from applied science, which is the application of research to human needs.
There are 13 chromosomes in a frog gamete and 26 in a frog body cell.
THe number of chromosomes in a nucleus depends on the species. In humans each nucleus has 23 pairs of chromosomes so there are 46 chromosomes total.