If you started off with 46 chromosomes (23 homologous pairs), and you copied your dna during interphase to make "sister" chromatids attached to one another (still for a total of 46), then lined the 46 chromosomes up next to their homologous "buddy" (meaning you now have 23 pairs in a row), then separated the partner-pairs from one another to make new nuclei. how many chromosomes would there now be in each of the two new nuclei?

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Environmental impacts on evolution : mastery test

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?