Question

If the DNA of a zygote has 20% adenine, thymine in the gametic DNA is
1) 40%
2) 20%
3) 30%
4)15%​

Answer 1

The correct answer is option 2) 20%. The thymine in the gametic DNA is 20%.

How the thymine which is in the gametic DNA is 20%?

• Based on the Chargaff Rule the above answer can be determined easily.
• According to Chargaff's rule Adenine is equal to Thymine and Guanine is equal to Cytosine.
• So when Adenine is 20% then the thymine with gametic DNA is also 20%.
• A=T and G=C.