Question

Fragile X syndrome, characterized by mental retardation, is caused by which chromosomal change?
deletion
translocation
inversion
insertion

Answer 1

On which feature is science based?
detailed research with reliable sources
static information that does not change
emotional appeals
test that cannot be repeated

Answer 2

Which is an agent that causes a mutation in DNA or chromosomes?
nondisjunction
karyotype
mutagen
phenotype