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Which sentence lists events in the cell cycle in correct order, from earlier to later?
The chromosomes become longer and thinner; spindle fibers attach to the centromeres.
The nuclear membrane reforms; the chromosomes align in the middle of the cell.
The chromosomes replicate; the nuclear membrane dissolves.
The sister chromatids are separated; the chromosomes condense.
Which term below describes a piece of DNA that provides a set of instructions to a cell to make a specific protein?
gene
chromosome
trait
homologous chromosome

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2. Chromosome is the instruction that consist the gene. A gene is a hereditary unit that is made up of  a sequence of DNA that occupies a specific location or site  on a chromosome, and which can be transcribed or copied into an RNA molecule that may function just as it is, or be translated  into amino acids.