| 1. |
A dominant allele determines a phenotype when present in -> a homozygous individual
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| 2. |
A haploid individual -> carries only recessive alleles
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| 3. |
If two genes are NOT linked, how likely are they to be inherited together? -> 50%
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| 4. |
You identify a single gene affecting three different phenotypes. What is this gene an example of? -> Pleiotropy
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| 5. |
If a trait is 100% penetrant, it means that -> there is no variation in the trait
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| 6. |
Examine carefully the pedigree below. Based on the inheritance pattern of this condition, where might its genetic cause reside? [IMAGE] Remember, in pedigrees, men are represented with a square and women with a circle. Roman numerals define generations (I, II, and III), and Arabic numerals (1, 2, and 3) define birth order within each generation. Here, someone carrying the condition has either a filled square or circle. -> Mitochondria
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| 7. |
When the expression of one gene modifies the expression of a different gene, it is known as -> epistasis
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| 8. |
Which of the following statements about mutant alleles is incorrect? -> A mutant allele is always recessive.
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| 9. |
If a true breeding chinchilla rabbit is crossed with a true breeding Himalayan rabbit, all the offspring are chinchilla. What does this information tell you about the relationship between the chinchilla and Himalayan alleles? -> Himalayan is recessive to chinchilla.
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| 10. |
If the phenotypic ratio of offspring from a cross between a Himalayan rabbit and a chinchilla rabbit is 2 chinchilla : 1 Himalayan: 1 albino, what were the genotypes of the parents? -> cchcch × chch
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