In Mendelian genetics, what is the expected phenotypic ratio of a monohybrid cross?
Practice Questions
1 question
Q1
In Mendelian genetics, what is the expected phenotypic ratio of a monohybrid cross?
1:1
3:1
9:3:3:1
1:2:1
The expected phenotypic ratio of a monohybrid cross is 3:1, where three offspring display the dominant trait and one displays the recessive trait.
Questions & Step-by-step Solutions
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Q
Q: In Mendelian genetics, what is the expected phenotypic ratio of a monohybrid cross?
Solution: The expected phenotypic ratio of a monohybrid cross is 3:1, where three offspring display the dominant trait and one displays the recessive trait.
Steps: 5
Step 1: Understand what a monohybrid cross is. It involves crossing two organisms 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.
Step 3: Use a Punnett square to visualize the genetic combinations from the parents.
Step 4: Count the expected offspring from the Punnett square. You will find that 3 out of 4 show the dominant trait.
Step 5: Conclude that the expected phenotypic ratio is 3:1, meaning 3 offspring will show the dominant trait and 1 will show the recessive trait.
