Answer:
17 = D
Explanation:
Crossing over occurs when two different genes are crossed together which is exactly what happened in this question :)
Modeling is important because it helps scientists determine how things work and also how its put together
Please mark as brainliest answer.
I think its b not sure tho
For many species, there are often regional differences in their genes, although most of the time this differences aren't noticeable in their outward appearance.
Phenotype, it shows your physical outward appearance of traits