Question

nondisjunction occurs when chromatids do not separate. aneuplodies have irregular numbers of chromosomes. an aneuploidy can occur as the result of a nondisjunction. complete patau syndrome is caused by edwards syndrome is caused by trisomy x syndrome is caused by an extra chromosome 18 an extra chromosome 13 an extra x chromosome done 4 of 4

Explanation:

Patau syndrome is caused by an extra chromosome 13. Edwards syndrome is caused by an extra chromosome 18. Trisomy X syndrome is caused by an extra X chromosome.

Answer:

Patau syndrome: an extra chromosome 13. Edwards syndrome: an extra chromosome 18. Trisomy X syndrome: an extra X chromosome.