Answer:
It would be B
Explanation:
By doing the punnet square, you get BB, BB ,Bb, Bb, of which 50% are heterozygous.
Secondary structures are dependent upon hydrogen bonding. The two main types of secondary structure are the a-helix and the B-sheet. The a-helix is a right-handed coiled strand.
With chromosomes crossing over frequently, it's more likely that genetic defects will occur in offsprinfg.