Anita thinks that she has heterozygous alleles for red hair. If she is correct, which of these diagrams best illustrates Anita’s alleles for red hair? 2 chromosomes are labeled Upper R and Upper R.
2 chromosomes are labeled Upper R and r.
One chromosome is labeled Upper R and another is unlabeled.
2 chromosomes are labeled r and r.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."