In a plant with a 3:1 ratio of dominant to recessive traits, how many offspring
Practice Questions
Q1
In a plant with a 3:1 ratio of dominant to recessive traits, how many offspring would you expect to show the dominant trait out of 100?
25
50
75
100
Questions & Step-by-Step Solutions
In a plant with a 3:1 ratio of dominant to recessive traits, how many offspring would you expect to show the dominant trait out of 100?
Correct Answer: 75
Step 1: Understand the ratio given, which is 3:1. This means for every 4 offspring, 3 will show the dominant trait and 1 will show the recessive trait.
Step 2: Add the parts of the ratio together. 3 (dominant) + 1 (recessive) = 4 total parts.
Step 3: Determine how many groups of 4 are in 100 offspring. Divide 100 by 4. 100 ÷ 4 = 25 groups.
Step 4: Calculate how many offspring show the dominant trait. Since 3 out of 4 show the dominant trait, multiply the number of groups by 3. 25 groups × 3 = 75 offspring.
Step 5: Conclude that out of 100 offspring, you would expect 75 to show the dominant trait.
