What happens to a chromosome during inversion?

Inversions. An inversion occurs when a chromosome breaks in two places; the resulting piece of DNA is reversed and re-inserted into the chromosome. Genetic material may or may not be lost as a result of the chromosome breaks.

What does an upside down chromosome mean?

Chromosome inversion
Chromosome inversion: A condition in which a chromosome segment is clipped out, turned upside down, and reinserted back into the chromosome. A balanced inversion causes no problems. An unbalanced inversion is often associated with problems such as developmental delay, mental retardation, and birth defects.

Does chromosome inversion cause infertility?

Inversions are structural chromosome abnormalities that are associated with infertility due to the increased risk of producing unbalanced gametes from recombination events within the inverted chromosome segment.

How common are chromosomal inversions?

Chromosome 9 inversion is one of the most common structural balanced chromosomal variants, with an estimated incidence of about 3.5 percent.

What are the effects of chromosome inversion?

During an inversion, a portion of the chromosome breaks off and reattaches in the inverted position, causing the sequence of the genes on that portion to be reversed. The genetic information is the same, but the characteristics that are affected by those genes might be changed.

Why does chromosome inversion happen?

An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end. An inversion occurs when a single chromosome undergoes breakage and rearrangement within itself.

What is most common chromosome inversion?

The most common inversion seen in humans is on chromosome 9, at inv(9)(p12q13).

What is inversion genetics?

inversion – (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed. genetic science, genetics – the branch of biology that studies heredity and variation in organisms.