Multiple Choice
In a dihybrid cross experiment, three different crosses produced the following numbers of male offspring: 18, 22, and 20. Which of the following is the mean number of male offspring produced by these three crosses?
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2. Mendel's Laws of Inheritance
Dihybrid Cross
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In a typical dihybrid cross, how many different alleles are involved in determining the two traits?
A
8
B
6
C
4
D
2
Verified step by step guidance1
Identify that a dihybrid cross involves two different traits, each controlled by a pair of alleles.
Recall that each trait is determined by two alleles (one from each parent), so for two traits, the total number of alleles is the sum of alleles for each trait.
Calculate the total number of alleles by multiplying the number of traits (2) by the number of alleles per trait (2), which gives $2 \times 2$.
Understand that the total number of different alleles involved in determining the two traits is therefore 4.
Conclude that in a typical dihybrid cross, there are 4 different alleles involved in determining the two traits.
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