Name ______Date ______Per. ______

Mutation: Use base pairing rules & the Codon Chart to identify the amino acid specified by each codon.

Identify each gene mutation as point or frameshift

Normal DNA: TACTTCAAACCG

mRNA:______- ______-______-______

Amino Acid: ______- ______-______-______

Mutated DNA- Type 1: TACTTCAAACCA

mRNA:______- ______-______-______

Amino Acid: ______- ______-______-______

Type of gene mutation: ______

Mutated DNA- Type 2: TACTTAAACCG

mRNA:______- ______-______-______

Amino Acid: ______- ______-______-______

Type of gene mutation: ______

Mutated DNA-Type 3: TACTTCAATCCG

mRNA:______- ______-______-______

Amino Acid: ______- ______-______-______

Type of gene mutation: ______

Unit 9 Worksheet: Evolution Worksheet Packet

Scenario: Consider the following fictional description

Warbels are small mammals that live in the desert and feed on seeds. All warbles look exactly the same. The only variation found in warbles is the time of day they forage for food-some warbles are nocturnal (active at night) and some warbles are diurnal (active during the day). The primary predators of warbles are owls, which hunt only at night.

Analyze and Conclude:

  1. Do you think nocturnal warbles and diurnal warbles have equal chances of being eaten by owls? Explain your reasoning. ______

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  1. Do you think that nocturnal warbles and diurnal warbles produce the equal number of offspring? Explain

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  1. Which type of warbles is more fit? Explain. ______

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  1. Over long period of time, changes can occur in warbles as a result of evolution. Based on the answers you have given in this activity, what sorts of changes do you think could occur in warbles due to evolution/natural selection? Explain your reasoning. ______

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Horsing around with Evolution:

As you know, evolution is a gradual process of change over time, and evolution is the result of natural selection. What many people do not realize, however, is that the evolution of a species is a continuous process whit no definite end. Modern plants and animals- and, of course, humans- are subject to the forces of natural selection today, just as they were millions of years ago. In this activity, you will study the stages in the evolution of the horse in order to answer the questions:

  1. Study the diagram of the four stages of horse evolution. Describe all the changes that you see. ______

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  1. A species evolves because of selection pressures in its environment. For example, each species of Darwin’s finches evolved a certain beak size and shape in response to the kind of food available. Food availability is only one of many factors that influence the evolution of traits. What aspects of a horse’s environment of lifestyle do you think caused it to evolve as it did?

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  1. Modern horses are well adapted to today’s grassland ecosystem. Fifty million years from now, grasslands may become mountains. If this happens, how do you think horses will change? Describe this future horse.

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