Cytosine pairs with guanine
adenine pairs with thymine
Would be 39.948 atomic mass
Sorry my fried, i need more information to be able to help you.
Answer:
If the parents were both carriers.
Explanation:
Since cystic fibrosis is a recessive genetic disorder, two of the same alleles must be present in order to show, so.. for example, the genotype would be cc. The parents without the disorder must've been carriers, and their genotype would be Cc.
If you do a punnet square, Cc x Cc = 25% cc, 50% Cc, and 25% CC.
Here goes your answer to your question and hope I’m not to late