Dr. Cho wants to know if differences in the growth rate of fish are based on genetics or the environment
He buys two fish. Fish 1 is fed everyday, while fish 2 is fed every other day. At the end of a month, fish 1 is nearly 15 percent larger than fish 2. Considering the fish have a nearly identical genetic makeup, what can Dr. Cho conclude?
A) Environmental changes can account for all the differences in growth rate.
B) Genetic influences must account for a majority of the differences in growth rate.
C) Environmental conditions were more favorable for fish 2.
D) Differences in growth rate cannot be determined by his simple experiment.
A
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