People with one copy of the allele that causes sickle cell anemia are called , while people with two copies of the allele have the disease.

dominance

Explanation:

answer for pf

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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