What is the major function of the thyroid gland? The major function of the thyroid gland is to produce thyroid hormones, according to HowStuffWorks. One hormone is called thyroxine and the other triiodothyronine, or T4 and T3. Together, they regulate the growth and development of nearly every system in the body.
The principle of independent assortment states that genes for different traits can segregate independently during the formation of gametes. The principle of independent assortment states that genes for different traits can segregate independently during the formation of gametes. Independent assortment helps account for the many genetic variations observed in plants,animals, and other organisms.
One, called gag, gives rise to the inner shell where the virusâs genes are stored. Another, called env, makes knobs on the outer surface of the virus, that allow it to latch onto cells and invade them. And a third, called pol, makes an enzyme that inserts the virusâs genes into its host cellâs DNA.It turns out that the human genome contains segments of DNA that match pol, env, and gag.Lots of them.Scientists have identified 100,000 pieces of retrovirus DNA in our genes, making up eight percent of the human genome.ne, called gag, gives rise to the inner shell where the virusâs genes are stored. Another, called env, makes knobs on the outer surface of the virus, that allow it to latch onto cells and invade them. And a third, called pol, makes an enzyme that inserts the virusâs genes into its host cellâs DNA.