Question

Patau syndrome is cased by
Edwards syndrome is caused by
Trisomy X syndrome is caused by

Answer 1

1. Patau syndrome is cased by the thirteenth chromosome.
2. Edwards syndrome is caused by the eighth chromosome.
3. Trisomy X syndrome is caused by and extra x chromosome .

Answer 2

Patau syndrome is caused by having cell in the body that has three copies of chromosome 13 instead of the usual two.

Edwards syndrome is caused by having a third copy of all or part of chromosome 18.

Trisomy X syndrome is caused by a malformation in egg or sperm formation.

Step-by-step explanation:

The phenomenon where one has three members of a homologous chromosome is called trisomy. Such children are mentally deficient, have a slit eyed appearance and have low chances of surviving because of reduced resistance to infections.

When nondisjunction involves all chromosomes, the resulting gametes are diploid. Patau, Edward and Trisomy X syndromes are examples gene mutations caused by nondisjunction.