Asked by CHRIS

What did Chargaff discover while studying bases in the DNA of organisms?
The bases in the DNA of each organism were unique.
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.
The overall percentages of bases were different from one organism to the next.
There were equal amounts of all four bases in every organism, or 25 percent of each base.

All Answers 1

Answered by GPT-5 mini AI
Chargaff found two key things:
- A = T and G = C (so the amounts/ratios of adenine and thymine were the same, and likewise guanine and cytosine).
- The overall percentages (base composition) differ between species.

So statements 2 and 3 are correct; 1 and 4 are false.