Answer: 3:1 dominant:recessive.
- A 3:1 dominant:recessive
- B 1:2:1 ratio as seen in incomplete dominance
- C 1:1 ratio as seen in a test cross
- D All offspring showing the dominant phenotype
Correct answer: A. 3:1 dominant:recessive
Explanation: Aa x Aa → 1 AA : 2 Aa : 1 aa. Phenotype: 3 dominant (AA + 2 Aa) : 1 recessive (aa). Classic 3:1 ratio.
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 →