The disease hemophilia is caused by a single gene that is located on the X chromosome. Because human females have two X chromosomes (XX), they have two copies of this gene. Since hemophilia is recessive (h), a female must have two copies of the recessive allele to have the disease.
<span>An insulin receptor is a neurotransmitter that is activated by the presence of insulin. This receptor is usually represented by the abbreviation (IR),</span>
