"Brown eyes are dominant over blue eyes. If two brown eyed parents have a child with blue eyes, what does it mean about the parent’s genotype?"

Because brown (B) is dominant over blue (b). Two parents who are Bb and so have brown eyes each have a 50% chance of passing a b to their child. ... By the old genetic rules, two blue-eyed parents would both be bb and so could only pass b to their kids.

Explanation:

well we can't tell you because we cant see the time give a screen shot or something.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."