Question

wednesday, october 8 quiz factors influencing prenatal devleopment started: oct 8 at 2:14pm quiz instructions choose the best answer. there are qeustions from previous objectives included. you will be allowed 3 chances and highest grade will be recorded. this test will be availble until thursday, october 9 at 4pm question 17 2 pts which birth defect is caused by the presence of an extra chromosome 21? fetal alcohol syndrome down syndrome hemophilia albinism

Explanation:

Down syndrome is a genetic disorder caused by the presence of all or part of an extra copy of chromosome 21. Fetal Alcohol Syndrome is caused by maternal alcohol consumption during pregnancy. Hemophilia is a genetic disorder related to blood - clotting factors. Albinism is a genetic condition affecting melanin production.

Answer:

Down syndrome