Explain a chromosome insertion and the effect it can have on a human.

Answer:

An insertion is when a piece breaks off from one chromosome and attaches to another chromosome. If the inserted portion contains genes already present, then those genes can be duplicated. Fragile X syndrome is sometimes caused by expansion to about 700 repeats in the FMR1 gene; these individuals may have delays in crawling or walking, hyperactive or impulsive behavior, intellectual disability, flat feet, flexible joints and large body size.