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Question 1 of 20
1. Question
In incomplete dominance, the phenotype of the heterozygous individual is:
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Question 2 of 20
2. Question
2. Which of the following is an example of co-dominance?
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Question 3 of 20
3. Question
3. In complementary gene action, the phenotypic ratio of the F2 generation in a dihybrid cross is:
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Question 4 of 20
4. Question
4. Which type of epistasis results in a phenotypic ratio of 12:3:1 in the F2 generation?
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Question 5 of 20
5. Question
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:
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Question 6 of 20
6. Question
6. Which of the following is an example of Y-linked inheritance?
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Question 7 of 20
7. Question
7. In X-linked recessive traits, the condition is more common in:
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Question 8 of 20
8. Question
8. Which of the following is an example of a sex-limited trait?
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Question 9 of 20
9. Question
9. In sex-influenced inheritance, the expression of traits is influenced by:
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Question 10 of 20
10. Question
10. The ZW system of chromosomal sex determination is found in:
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Question 11 of 20
11. Question
11. (Challenging) In a cross between a red-flowered snapdragon (RR) and a white-flowered snapdragon (rr), the F1 generation will have:
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Question 12 of 20
12. Question
12. Which of the following coat colors in shorthorn cattle is an example of co-dominance?
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Question 13 of 20
13. Question
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:
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Question 14 of 20
14. Question
14. Which type of epistasis results in a phenotypic ratio of 9:3:4 in the F2 generation?
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Question 15 of 20
15. Question
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?
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Question 16 of 20
16. Question
16. Which of the following is NOT a characteristic of X-linked recessive traits?
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Question 17 of 20
17. Question
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?
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Question 18 of 20
18. Question
18. Which of the following is an example of haplodiploidy?
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Question 19 of 20
19. Question
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?
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Question 20 of 20
20. Question
20. Which of the following genes is crucial for male development in the XY system of sex determination?