How does crossing over introduce variation in meiosis?
a. It causes homologous chromosomes to be grouped differently.
b. It causes eggs and sperm to unite in different ways
c. It causes all the homologous chromosomes to find new partners.
d. It increases the amount of DNA in the nucleus.
e. It positions alleles next to each other that previously were not together.
Answer: e. It positions alleles next to each other that previously were not together.
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