题目内容

Linked genes（）

A. co-segregate
B. assort randomly
C. can crossover and recombine
D. are allelic
E. will segregate independently

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Linked genes always exhibit（）

A. recombination frequencies of less than 50%
B. phenotypes that are similar
C. homozygosity when involved in a testcross
D. a greater number of recombinant offspring than parental offspring when involved in a testcross
E. a lack of recombinant offspring when a heterozygous parent is involved in a testcross

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What phenomenon describes a genetic trait that is expressed more strongly or earlier in development with each generation（）

A. anticipation
B. epigenetics
C. maternally determined progeny phenotypes
D. epistasis

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In order to determine if mutations from different organisms that exhibit the same phenotype are allelic, which test would you perform（）

A. complementation test
B. test cross
C. epistasis test
D. allelic series test
E. biochemical test

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The himalayan allele in rabbits produces dark fur at the extremities of the body—on the nose, ears, and feet. The dark pigment develops, however, only when a rabbit is reared at a temperature of 25°C

A. temperature-sensitive allele
B. dominance
C. discontinuous characteristic
D. genetic imprinting
E. phenocopy

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Linked genes（）

A. co-segregate B. assort randomly C. can crossover and recombine D. are allelic E. will segregate independently

Linked genes always exhibit（）

What phenomenon describes a genetic trait that is expressed more strongly or earlier in development with each generation（）

In order to determine if mutations from different organisms that exhibit the same phenotype are allelic, which test would you perform（）

The himalayan allele in rabbits produces dark fur at the extremities of the body—on the nose, ears, and feet. The dark pigment develops, however, only when a rabbit is reared at a temperature of 25°C

A. co-segregate
B. assort randomly
C. can crossover and recombine
D. are allelic
E. will segregate independently