Lecture 2 AGB Quiz

1. In incomplete dominance, the phenotype of the heterozygous individual is:
   

2. Which of the following is an example of co-dominance?

3. In complementary gene action, the phenotypic ratio of the F2 generation in a dihybrid cross is:

4. Which type of epistasis results in a phenotypic ratio of 12:3:1 in the F2 generation?

5. In Labrador retrievers, the presence of two recessive alleles (ee) at one locus masks the expression of black or brown coat color, resulting in yellow coat. This is an example of:

6. Which of the following is an example of Y-linked inheritance?

7. In X-linked recessive traits, the condition is more common in:

8. Which of the following is an example of a sex-limited trait?

9. In sex-influenced inheritance, the expression of traits is influenced by:

10. The ZW system of chromosomal sex determination is found in:

11. (Challenging) In a cross between a red-flowered snapdragon (RR) and a white-flowered snapdragon (rr), the F1 generation will have:

12. Which of the following coat colors in shorthorn cattle is an example of co-dominance?

13. (Challenging) In a dihybrid cross involving two complementary genes, if both parents are heterozygous for both genes, the proportion of offspring with the recessive phenotype will be:

14. Which type of epistasis results in a phenotypic ratio of 9:3:4 in the F2 generation?

15. (Challenging) In X-linked recessive inheritance, if a carrier female mates with an affected male, what proportion of their male offspring will be affected?

16. Which of the following is NOT a characteristic of X-linked recessive traits?

17. (Challenging) In sex-influenced inheritance, if a male with a dominant trait mates with a female without the trait, what proportion of their male offspring will express the trait?

18. Which of the following is an example of haplodiploidy?

19. (Challenging) In a cross between two individuals heterozygous for a trait controlled by duplicate dominant epistasis, what proportion of the offspring will display the recessive phenotype?

20. Which of the following genes is crucial for male development in the XY system of sex determination?