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which of the following will occasionally produce a duplicate gene?
A) Chromosome replication during mitosis
B) Crossing-over during meiosis
C) Neutral mutation during transcription
D) Genetic drift during reproduction
Homologous chromosomes exchange DNA during meiosis in a process called crossing-over. Crossing-over sometimes involves an unequal swapping of DNA. Basically one chromosome in the pair gets extra DNA.
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