A Large Population of Fish Live in a Lake

question 3

Multiple Choice

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.

-What is the frequency of the S¹ allele in the fish population after the asteroid hit?

• A)0.15
• B)0.20
• C)0.25
• D)0.40
• E)0.80

Analyze the role of environmental and lifestyle factors in the mental health of the elderly.

Understand how demographics and social factors like Internet use affect the mental health and behavior of the elderly.

Identify the symptoms and progression of Alzheimer's disease.

Understand the epidemiology and prevalence of Alzheimer's disease globally.

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Definitions:

Indirect Request

A polite or less direct method of asking for something, often intended to be more courteous.

Presentation

A formal display or exhibition of information or ideas, typically involving speaking before an audience and sometimes using visual aids.

Omit Negative Information

The practice of deliberately leaving out unfavorable data or facts from communication to influence perception.

Trivial

Of little significance or value; unimportant or insignificant tasks or matters.