Answer:
Each parent carries a gene for green (y) and a gene for yellow (Y). Place one parent's genes along the top of the Punnett square and the other parent's genes along the left side. Copy the genes down the columns and across the rows. Each of the four squares now shows a possible genotype combination
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Explanation:
The answer is letter B has commercial uses such as Alcohol production and bread making.
B is the answer! Hope this helps :)
The answer for this one is b) Looping of DNA