Science
Strand III
Use Scientific Knowledge from the Life Sciences in Real-World Contexts

 

Science/Strand III
Content Standard 3
All students will investigate and explain how characteristics of living things are passed on through generations; explain why organisms within a species are different from one another; and explain how new traits can be established by changing or manipulating genes. (Heredity)

 

Science/Strand III/Content Standard 3
High School

 

Science/Strand III/Content Standard 3/High School
Benchmark 2
Describe how genetic material is passed from parent to young during sexual and asexual reproduction.

Benchmark Clarification

Genetic material is passed from parent to young during sexual reproduction or asexual reproduction.

Students will:

  • Compare and contrast the processes of meiosis and mitosis
  • Compare and contrast sexual reproduction and asexual reproduction
  • Explain how DNA replicates
  • Explain why sexual reproduction provides greater variation in individuals, and within a population, compared to asexual reproduction

Key Concept / Real World Context / Instructional Example / Assessment Example / Resources

 

Science/Strand III/Content Standard 3/High School/Benchmark 2
Key Concept
Types of cell division:

  • mitosis
  • meiosis

DNA replication, chromosome

Types of reproduction:

  • sexual
  • asexual

Genetic variation

Tools:

  • A-V media
  • diagrams showing DNA replication during cell division

 

Science/Strand III/Content Standard 3/High School/Benchmark 2
Real World Context
Fruit flies, yeast, reproduction by spores, cloning

 

Science/Strand III/Content Standard 3/High School/Benchmark 2
Instructional Example

Benchmark Question: How does genetic material pass from parent to young during sexual and asexual reproduction?

Focus Question: How does DNA replicate?

With each student representing a nitrogen base, students will model the replication of DNA.

Example: Give students cards with the nitrogen bases of DNA (adenine, guanine, cytosine, thymine). Have one-quarter of the students form a single chain with their bases. Other students should then match their complementary bases to the first strand to form one double strand. The teacher acts as the enzyme to unzip the DNA and form two single strands. The teacher then matches new complementary bases to the bases in the original two strands. Students should compare the two new strands to each other and to the original strand. After replicating DNA, the class will discuss how this replication of DNA relates to cell division.

Constructing: (SCI.I.1.HS.2), (SCI.I.1.HS.5).

Reflecting: None

 

Science/Strand III/Content Standard 3/High School/Benchmark 2
Assessment Example

With a partner, students will write a story in which a student becomes a nitrogen base. Each pair of students will explain the events, step by step, that happen to the student (nitrogen base) from the beginning to the end of DNA replication. Each pair of students will use their knowledge of this scientific process and appropriate scientific vocabulary in the story.

Extension:

1. Research cloning and present a speech explaining reasons for or against human cloning.

2. Research gene manipulation and present a speech explaining reasons for or against gene manipulation.)

(Give students rubric before activity.)

Scoring Rubric

Criteria

Apprentice

Basic

Meets

Exceeds

Accuracy of DNA replication

Provides an account of the steps of DNA replication with more than one error.

Provides an account of the steps of DNA replication with one error.

Provides an accurate account of the steps of DNA replication.

Provides an accurate account of the steps of DNA replication with creativity.

Correctness of mechanics

Explains with inappropriate vocabulary or grammar.

Explains with partially correct vocabulary or grammar.

Explains with appropriate vocabulary and grammar.

Explains with extended vocabulary and exceptional grammar.

 

Science/Strand III/Content Standard 3/High School/Benchmark 2
Resources

Webliography.
http://mtn.merit.edu/mcf/SCI.III.3.HS.2.html

Meiosis.
http://www.looksmart.com/eus1/eus53706/eus53712/eus53774/eus330259/eus951709/r?l&

Mitosis.
http://www.looksmart.com/eus1/eus53706/eus53712/eus53774/eus330259/eus951708/r?1&