Scientists searching for new anticancer drugs treat a cell c…

Scientists searching for new anticancer drugs treat a cell culture with a certain compound. Following treatment, they notice that the culture has stopped growing. Untreated cells from the same culture, however, have continued to grow. These results could indicate that the compound blocks the normal cell cycle. What else could have caused these results?

Suppose that in a certain community in London there were equ…

Suppose that in a certain community in London there were equal numbers of red-haired and green-haired individuals. (None of them dyed their hair. ) This hair-color trait was controlled by a single pair of alleles that followed the patterns of simple Mendelian dominance. Two people with red hair sometimes have children with green hair, but two people with green hair never have children with red hair. We can conclude that: