How many molecules of dna would result from one molecule after three cycles of pcr?

a. 8
b. 16
c. 3
d. 33

The right answer is eight.

PCR (polymerase chain reaction) is a method of molecular biology of in vitro gene amplification. It makes it possible to duplicate in large numbers (with a multiplication factor of the order of one billion) a known DNA or RNA sequence, from a small quantity (of the order of a few picograms) of acid. nucleic acid (specific DNA sequence (Amplicon)) and specific primers consisting of synthetic oligonucleotides of 20 to 25 nucleotides.

So, from a DNA molecule, we get 2 molecules in the first cycle, then 4 in the second cycle, and finally 8 in the third cycle.

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.