What is the expected phenotypic ratio in a monohybrid cross?
Practice Questions
1 question
Q1
What is the expected phenotypic ratio in a monohybrid cross?
3:1
1:2:1
9:3:3:1
1:1
The expected phenotypic ratio in a monohybrid cross is 3:1 for dominant to recessive traits.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the expected phenotypic ratio in a monohybrid cross?
Solution: The expected phenotypic ratio in a monohybrid cross is 3:1 for dominant to recessive traits.
Steps: 5
Step 1: Understand what a monohybrid cross is. It is a genetic cross between two individuals that differ in one trait.
Step 2: Identify the dominant and recessive traits. The dominant trait is the one that appears in the offspring, while the recessive trait does not appear when the dominant trait is present.
Step 3: Use a Punnett square to visualize the genetic combinations from the parents. Each parent contributes one allele for the trait.
Step 4: Count the possible combinations of offspring. In a monohybrid cross, you will typically get three offspring with the dominant trait and one with the recessive trait.
Step 5: Write the expected phenotypic ratio. This ratio is 3 dominant traits to 1 recessive trait, which is expressed as 3:1.
