Answer is D.
you can learn A,B, and C from examining fossils
Answer:
4 red : 0 white
Explanation:
R R
r Rr Rr
r Rr Rr
Since the dominant allele is RR this means that it will always be red
I believe the answer is sister chromatids in a chromosome.
To be exact 23 pairs of sister chromatids.
Hope this helps .