What is the segment of a dna chain that codes for all or part of a trait?
o
a. rna
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b. gene
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c. chromosome
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d. cytoplasm

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

How does the nervous system affect the excretory system?

Using the gas pedal analogy explain the impact on the cell cycle of one mutated tumor suppressor gene allele versus two mutated tumor suppressor alleles