They are important? similar?
Prophase is the first step in mitosis and many changes occur. Chromatin fibers become coiled into chromosomes, with each chromosome having 2 chromatids joined at a centromere. The mitosis spindle, composed of microtubules and proteins, form in the cytoplasm.
Build several models of his tree house out of different materials, and see which model holds up best to wind, water, and ice.
A. At the end of meiosis I each cell has twice the number of chromosomes as was in the original cell.
