Why is pcr a necessary step in the analysis of a dna sample taken from a crime scene a: the sample yields very little dna b: the sample may be contaminated c: the sample undergoesdegradation d: the sample may not provide an accurate sequence

Which pattern most likely came from a gunshot and which one was produced from a blow on the head? explain your answer?

In familial hypercholesterolemia individuals homozygous for the allele causing the disorder completely lack receptors on liver cells that take up cholesterol from the blood stream. heterozygous have one-half the number of receptors while individuals homozygous for the normal allele are phenotypically normal. this is an example of a.epistasis b.complete dominance c. incomplete dominance d. codominance

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that