Answer: A = T and G = C (complementary base pairing).
- A A = G and C = T, an unrelated pairing rule
- B A = T and G = C (complementary base pairing)
- C A is generally found in greater amount than T
- D The ratio of A+T to G+C is generally constant within a species
Correct answer: B. A = T and G = C (complementary base pairing)
Explanation: Chargaff's rules: A = T and G = C (in quantity). This holds for double-stranded DNA of any species.
Punnett square for a monohybrid cross between two heterozygous (Tt) parents, showing the 3:1 phenotypic ratio predicted by Mendel's Law of Segregation.
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
Read the full Principles of Inheritance and Variation notes →