Dihybrid Crosses

Description: Dihybrid Crosses Quiz
Number of Questions: 15
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Tags: genetics dihybrid crosses inheritance
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In a dihybrid cross, the F1 generation shows a phenotypic ratio of 9:3:3:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: A
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 9:3:3:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 12:3:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: A
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 9:3:3:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 15:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: C
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 3:1:1:3.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 13:3. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: A
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 9:3:3:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 7:2:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: A
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 9:3:3:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:1:1:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: D
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 1:1:1:1, and a genotype ratio of 1:1:1:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 3:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: C
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 3:1:1:3.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:2:1. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: B
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:2:1:2.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 9:3:4. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: A
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 9:3:3:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:1:2:2. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: B
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:2:1:2.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:2:2:4. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: B
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:2:1:2.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:1:1:2. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option: D
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:1:1:1.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:1:2:4. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option:
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:1:2:4.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:2:3:4. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option:
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:2:3:4.

In a dihybrid cross, the F1 generation shows a phenotypic ratio of 1:2:3:6. What is the genotype ratio of the F2 generation?

  1. 9:3:3:1

  2. 1:2:1:2

  3. 3:1:1:3

  4. 1:1:1:1


Correct Option:
Explanation:

The F2 generation in a dihybrid cross will have a phenotypic ratio of 9:3:3:1, and a genotype ratio of 1:2:3:6.

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