B._K + ___Cl2_KCl right answers only

b brown mice / white sand dunes

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.