If embryonic testes properly produce testosterone, but
a genetic male nevertheless develops female external genitalia, the cause could
be a mutation in the gene that codes for
the testosterone receptor.
Mutation
of gene means, change in the sequence of DNA (deoxyribonucleic acid). A genetic disorder is a condition when mutations occurred in one or more genes.
The speed at which air is expelled from the lungs during the middle portion of a forced expiration is very important to the actions of the internal intercostals.
