2. which substance has a neutral ph?
o rainwater
o groundwater
o milk
o distilled water

answer: c

explanation:

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.