Graded Assignment

Lab Report: Modeling DNA Replication

Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit.

Total score: Click or tap here to enter text. of 10 points

(Score for Question 1 Click or tap here to enter text.: of 2 points)

1. In your own words, describe DNA replication.

Answer:

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(Score for Question 2: Click or tap here to enter text. of 2 points)

2. How does your original DNA molecule compare with the replicated molecule?

Answer:

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(Score for Question 3 Click or tap here to enter text.: of 2 points)

3. Write a sentence that relates your model to processes that take place inside your own cells. Your answer should include some form of the terms mitosis, nucleus, and cell division.

Answer:

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(Score for Question 4: Click or tap here to enter text. of 2 points)

4. Describe two roles that enzymes play in DNA replication.

Answer:

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(Score for Question 5: Click or tap here to enter text. of 2 points)

5. Draw a sketch of your molecule during replication. Make sure you label the replication fork, parent strand, daughter strand, and beginning of replication.

Answer:

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Mid-Unit Assessment, Part 2: The Chemistry of Life Complete this teacher-scored portion of the assessment and submit it to your teacher.

Total score:

_ of [9] points

(Score for Question 1: _ of [3] points)

1. Discuss the types of trace elements in organic compounds.

Answer:

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(Score for Question 2: _ of (3] points)

2. Discuss how compounds in different types of organisms can be used to benefit people.

Answer:

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(Score for Question 3: _ of [3] points)

3. Describe what is meant when water is called a polar molecule.

Answer:

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Graded Assignment

1. Discuss how crossing-over leads to greater variability of phenotypes. Give an example to help explain your answer.

Answer:

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(Score for Question 2: ___ of 5 points)

2. Assume you are performing a cross between a plant that is heterozygous for the dominant traits red flowers and wrinkled seeds, with a plant that is homozygous for the recessive traits white flowers and smooth seeds. Assume the alleles are R for red flowers, r for white flowers, W for wrinkled seeds, and w for smooth seeds. The offspring of this cross show the following phenotypes:

43 red flowers and wrinkled seeds

7 red flowers and smooth seeds

9 white flowers and wrinkled seeds

41 white flowers and smooth seeds

What are the traits of the recombinant offspring in terms of flower color and seed shape? Explain how you know that these offspring are recombinant. What alleles would you expect to see in the individual chromosomes of each parent before and after crossing-over takes place? What is the recombination frequency? What is the distance between the genes in map units?

Answer:

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(Score for Question 3: ___ of 5 points)

3. What differences would you expect to see in a population made up of individuals whose chromosomes experience crossing-over frequently compared with a population made up of individuals whose chromosomes do not cross over? Explain your reasoning.

Answer:

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