A Large Population of Fish Live in a Lake

question 17

True/False

A large population of fish live in a lake. The color of their scales is determined by two different alleles of the S gene, S1 and S2. Homozygous S1 fish have yellow scales, S2 homozygotes have blue scales, and heterozygotes are green. Scientists catch 100 fish at random and record their color. Among those 100 fish are 30 yellow, 50 blue, and 20 green ones.

After the original sample is analyzed, an asteroid landed in the lake and killed all the fish that happened to be in one location. When 100 fish were sampled again, 15 were yellow, 75 were blue, and 10 were green.

-The fish population is in Hardy-Weinberg equilibrium before the asteroid hit.

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Definitions:

Heterogeneous Mixture

A combination of substances that are not uniformly distributed and in which the individual components can be distinguished physically.

Nitrogen

A colorless, odorless gas that is the most abundant element in the Earth's atmosphere, essential for plant and animal life.

Argon

A noble gas element with atomic number 18, colorless and odorless, used in lighting and welding due to its inertness.

Baking Soda

A common name for sodium bicarbonate, a chemical compound used in baking as a leavening agent.