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Nucleotide segments of a DNA molecule that make up genes and are actually expressed in the phenotype of an organism are called ______________.
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- Why does DNA replication require the enzyme primase?A. Primase builds a DNA primer to stabilize the replication fork.B. Primase builds an RNA primer so that DNA polymerase has a free 3' end to attach nucleotides to.C. Primase builds an RNA primer to stabilize the replication fork.D. Primase builds a DNA primer so that DNA polymerase has a free 3' end to attach nucleotides to.
- In pea plants, the purple allele is sufficient for making purple flowers, even if one of the homologous chromosomes carries the white allele. Which of the following statements are true in this case?A. Purple flowers will be produced, unless the enzyme that prevents the synthesis of purple pigment is present.B. The white allele is the recessive allele.C. One purple allele results in enough purple pigment for the flowers to be purple.D. The purple allele is the dominant allele.E. White flowers are the dominant trait, unless the enzyme that leads to the synthesis of white pigment is absent.
- A person with AB blood illustrates the principle of _________ since both the A and B allele are expressed.