Question

Ratio prediction complete the following steps: 1 open lab data. Record expected phenotypic ratio of LlBb x LlBb dihybrid cross.

a) 9:3:3:1
b) 1:2:1
c) 3:1
d) 1:1:1:1

Answer 1

The correct answer is a) 9:3:3:1. expected phenotypic ratio for a dihybrid cross (LlBb x LlBb) is 9:3:3:1. The ratio represents the probability of each phenotype among the offspring. The ratio represents the probability of each phenotype among the offspring.

Step-by-step explanation:

The expected phenotypic ratio for a dihybrid cross (LlBb x LlBb) is 9:3:3:1.

The ratio represents the probability of each phenotype among the offspring. The ratio is obtained by calculating the likelihood of each possible genotype and reducing it to a fraction of the total possible genotypes. In this case, the phenotypic ratio is calculated as follows:

• AA, Aa, aA x BB, bB, Bb = 9/16
• AA, Aa, aA x bb = 3/16
• aa x BB, bB, Bb = 3/16
• aa x bb = 1/16

Therefore, the correct answer is a) 9:3:3:1.