In the lab, Nachman examined dark mice from two different populations living hundreds of miles apart. The mice looked nearly ide
ntical. Their dark color was caused by two different genes. What does this tell you? a. dark color evolved only once in rock pocket mice
b. under very similar conditions, natural selection can favor very similar adaptations
c. there are at least two genes involved in creating dark mouse fur
d. two completely different mutations in two separate genes can generate the same phenotype
e. dark fur color evolved independently on each lava flow
Cell division is different in this type of multinucleated cells, in them there is mitosis but no cytosinesis or cytoplasm division. These muscle cells have nuclei in the periphery of the cell. In the life cycle of these cells there are successive divisions of all nuclei
nuclear division begins, and the parent cell is divided in half, forming 2 daughter cells. Each daughter cell will have half of the original 46 chromosomes, or 23 chromosomes.
