Answer:
(three) crossing over, mutations caused during crossing over, and independent assortment.
Explanation:
Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I.
By the heat of the enegry
To identify the host cell that has taken up the gene of interest
<span>What is the approximate age of our solar system?
</span>b. 4.6 billion years