Jason was born with _____.The doctor tells his parents that this genetic disorder occurred because he has an extra copy of chromosome 21.

Question

Quizplus · Accepted Answer

Down syndrome is caused by the presence of an extra copy of chromosome 21. Fragile X syndrome is caused by the expansion of a repeating sequence of DNA, Klinefelter disease involves an extra X chromosome in males, and Tay Sach's disease is caused by a deficiency in an enzyme that breaks down fatty substances.

Jason Was Born with _____