Question

how does fertilization create genetic variation?
it brings together gametes with different combinations of genetic information.
it bring together gametes with identical genetic information.
it causes mutations to the dna in each generation.

Explanation:

To determine how fertilization creates genetic variation, we analyze each option:

• Option 1: Gametes (sperm and egg) are produced through meiosis, which results in each gamete having a unique combination of genetic information (due to processes like crossing - over and independent assortment). During fertilization, a sperm (with its unique genetic info) and an egg (with its unique genetic info) fuse. So, fertilization brings together gametes with different combinations of genetic information, which leads to genetic variation in the offspring.
• Option 2: Gametes do not have identical genetic information. As mentioned, meiosis creates genetic diversity in gametes, so this option is incorrect. Also, there is a subject - verb agreement error ("bring" should be "brings").
• Option 3: Fertilization itself does not cause mutations to the DNA. Mutations can occur during DNA replication (e.g., in cells undergoing mitosis or meiosis) or due to external factors like radiation or chemicals, but not as a direct result of fertilization.

Answer:

A. It brings together gametes with different combinations of genetic information.