Autosomal linkage and epistasis Quiz
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5 questions, one answer each
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1. Which statement describes linked genes?
- A. They are on different chromosomes
- B. They are on the same chromosome and tend to be inherited together
- C. They are alleles of the same gene
- D. They are always inherited as recombinants
2. What produces recombinant offspring in a test cross with linked genes?
- A. Mutation in the gametes
- B. Independent assortment
- C. Crossing over in prophase I
- D. Fertilisation
3. Two Labradors ( epistatic) are mated. What proportion of puppies is yellow?
- A. 1/16
- B. 3/16
- C. 1/4
- D. 9/16
4. A cross gives a 9 : 7 ratio. What explains this?
- A. Linked genes
- B. Complementary epistasis
- C. Codominance
- D. Sex linkage
5. A test cross gives 430, 430, 70 and 70 offspring. What does this show?
- A. Independent assortment
- B. Linkage with some crossing over
- C. No crossing over
- D. Codominance