Random mutations may occur that cause a change in the order of nitrogen bases in a codon. One type of mutation involves the substitution of one of the nitrogen bases in a codon. Explain the effect of a substitution of one of the bases in a codon

Testosterone
Chemical messengers, or are also called “hormones” are chemicals in the body that sends signal on a certain gland organ to enable or stimulate their supposed function. An example is a testosterone, testosterone is a hormone mainly produced by the testes in males. Though this gland is also present in females, amount varies due to its chemical properties which affect males in their physical and psychological make-up. Testosterone is also responsible for spermatogenesis in males, in which this process in simpler terms is to the production of sperm cells –males.