Explain sophisticated genetic testing in human evolution

Sophisticated genetic testing is on the verge of making it possible to manipulate the genes of a human fetus to determine traits such as height, weight, and body shape. What impact, if any, would you expect from this type of designer genetics on human evolution? Write a brief essay on whether you believe this will have a positive, negative, or any impact on our evolution.

https://www.youtube.com/watch?v=CBezq1fFUEA

https://www.khanacademy.org/test-prep/mcat/behavior/human-development/v/brain-changes-during-adolescence

here is the link to my book http://booksdescr.org/ads.php?md5=177038CBA607B1843925C534C6685616

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