The correct answer is letter D, tumor-suppressor genes normally control cell proliferation or activation of apoptosis.
Tumor-suppresor genes are actually normal genes that act and slow down cell division. They are also responsible for repairing DNA mistakes and they tell cells when to die (apoptosis).
<span>Lysosomes
house enzymes that break down nutrients for use by the cell and help
recycle materials that cannot be used, which will later be excreted from
the cell. So the answer is false.</span>
If purple is dominant, the genotype of the purple flower could be PP or Pp, as both would give a purple colour. However, if the crossed flower turned out to be white, we could say with certainty that the genotype of the purple flower is Pp as the genotype of the white crossed flower would be pp, which would not be possible if the purple flower's genotype was PP.
