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1. What is the map distance between two genes with a recombination frequency of

ID: 23065 • Letter: 1

Question

1. What is the map distance between two genes with a recombination frequency of 0.08?
A. 8 cM
B. 0.08 cM
C. 80 cM
D. 0.8 cM
E. None of the above

2. _______ is the term for an allele that has more than one distinguishable phenotypic effect.
A. Pleiotropy
B. Incomplete dominance
C. Codominance
D. Epistasis
E. Heterosis

3. Incomplete dominance
A. results in a phenotypic ratio of 1:2:1 in a monohybrid cross.
B. is far less common than complete dominance.
C. is the same as codominance.
D. involves the distinct expression of both alleles, as in the ABO blood group system.
E. occurs only in X-linked genes.

4. Codominance
A. occurs when heterozygotes show a phenotype intermediate between those of the two homozygotes.
B. involves the expression of both alleles at a locus producing two different phenotypes.
C. is only found in mammalian enzyme production.
D. involves one allele having more than one phenotypic effect.
E. would result in pink flowers from a cross between white and red flowers.

5. The cross AaBb

Explanation / Answer

1. What is the map distance between two genes with a recombination frequency of 0.08?
A. 8 cM
B. 0.08 cM
C. 80 cM
D. 0.8 cM
E. None of the above

2. _______ is the term for an allele that has more than one distinguishable phenotypic effect.
A. Pleiotropy
B. Incomplete dominance
C. Codominance
D. Epistasis
E. Heterosis

3. Incomplete dominance
A. Results in a phenotypic ratio of 1:2:1 in a monohybrid cross.
B. is far less common than complete dominance.
C. is the same as codominance.
D. involves the distinct expression of both alleles, as in the ABO blood group system.
E. occurs only in X-linked genes.

4. Codominance
A. occurs when heterozygotes show a phenotype intermediate between those of the two homozygotes.
B. Involves the expression of both alleles at a locus producing two different phenotypes.
C. is only found in mammalian enzyme production.
D. involves one allele having more than one phenotypic effect.
E. would result in pink flowers from a cross between white and red flowers.

5. The cross AaBb