Because the red eyes are recessive to black eyes, the parents could be heterozygous. Recessive alleles only show if two recessive alleles are combined. Thus the offsprings phenotypes of the gene would be C. Rr and rr
Answer:
It is difficult to obtain a final conclusion with this information, but it is possible that the sample doesn't contain living organisms whose genetic material is composed of DNA. Another possible reason for this result is that the DNA extraction protocol used in the experiment is not suitable for this sample.
C.submarines
We use satellite and sonar today to see the ocean ridges and deep sea diving is impossible unless you have a submarine
I believe the correct answer is B. False
The aortic valve prevents backward flow of blood into the left ventricle.