N the Watson-Crick model of DNA, the two strands of the double helix are united by hydrogen bonds between a.
nitrogenous bases

b.
phosphate groups

c.
nitrogen atoms

d.
sugar molecules

What is the purpose of a punett square? a: finding the number of offspring people can haveb: predicting the outcome of genetic crosses c: finding how many genes a person has d: predicting the outcome of a coin toss (i think it's b or c but i'm not sure)