Recently, a type of genetically modified fish has
been approved for sale for human consumption.
The modified fish contain a growth hormone
gene from a different fish species. As a result, the
modified fish grow rapidly and are ready to sell in
almost half the time it normally would take. The
modified fish are able to produce the new growth
hormone because
(1) each of their cells contains the new gene to
produce growth hormone
(2) each gene contains the code to synthesize
carbohydrates
(3) the altered gene directs the mitochondria to
synthesize the hormone
(4) the modified body cells are able to reproduce
by meiosis