Puberty is caused by the release of follicle stimulating hormone and luteinizing hormone from the pituitary gland. these hormones are delivered to the ovary in girls and initiate the monthly release of mature egg cells. this is an example of what mechanism of regulation of gene expression?
a. a typical signal transduction pathway
b. homeotic genes
c. induction
d. activation of micro rnas

The onset of puberty  in girls by the release of these two hormone is an example of typical signal transduction pathway

Explanation:

Specifically Luteinizing Hormone (LH)  along with the Follicle stimulating Hormone (FSH) released from pituitary gland gets attached to the receptors present in the cells of ovary and generate a series of chemical reaction or cascade of biochemical reaction in a cell (activation of secondary messengers like cAMP) to produce estrogen and progestrone that will help in follicle formation and ovum maturation.