题目内容

The R locus determines flower color in a new plant species. Plants that are genotype RR have red flowers, and plants that are rr have white flowers. However, Rr plants have pink flowers. What type of

A. incomplete dominance
B. complete dominance
C. codominance
D. complementation
E. lethal alleles

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In poodles, black is dominant to white. A black poodle is crossed with a white poodle. In a litter of four, all of the puppies are black. What is the best conclusion（）

A. The black poodle is probably homozygous
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D. The black poodle is probably heterozygous

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The R locus determines flower color in a new plant species. Plants that are genotype RR have red flowers, and plants that are rr have white flowers. However, Rr plants have pink flowers. What type of

A. incomplete dominance B. complete dominance C. codominance D. complementation E. lethal alleles

Which of the following are NOT prokaryotes（）

If a healthy cell passes the G1/S checkpoint（）

In poodles, black is dominant to white. A black poodle is crossed with a white poodle. In a litter of four, all of the puppies are black. What is the best conclusion（）

What process is unique to plants（）

A. incomplete dominance
B. complete dominance
C. codominance
D. complementation
E. lethal alleles