Answer:
A. single-gene
Explanation:
It is controlled by a single gene that has two alleles. The allele for a widow's peak is dominant over the allele for a hairline with no peak.
The classification of species includes: structure, shape, pattern, color, and physical traits.
Can I have a brainliest?
Most things can't be explained or it hasn't been discovered yet. Science is all about asking questions and figuring out how things are the way they are.
Answer:
I would say it is B.
Explanation:
In Meiosis, specifically in Prophase 1, it creates genetic variation. Crossing over occurs in that stage
