What is the phenotype ratio of the given Punnett diagram?

The correct answer is: 9:3:3:1

• Phenotype is the physical traits of an organism such as height, color, size, etc.
• The phenotype depends up on the expression of genes.
• Genes can be dominant or recessive.
• The phenotype is the result of the expression of genes.
• The genotype of the offspring are dominant for 9AB, 3Ab, 3aB and 1ab.
• Hence, the phenotype ratio is 9:3:3:1