Codominance occurs when a recessive gene overpowers a dominant gene. there is an exact compromise between two genes. a dominant gene overpowers a recessive gene. genetic effects are overpowered by environmental factors.

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects