Which of these changes in todays world is a product of advances in biology

Ahypothesis that has been tested again and again , with similar results each time may become a law , true or false

Dominance the dominant allele doesn’t fully mask or hide the recessive. for example, a red carnation with a white carnation will produce a carnation. one gene one trait. well most of the time than one gene controls a trait. we are all different but genetically speaking we are % similar with regards to genetic makeup.

Which is required for sexual fissiondiploid cell productionmeiosis