Lesson Plan for Ken Pitts’ Biology Class
Jan. 10 Period 4, 6 & Jan. 11 Periods 1, 5
Students Previous Knowledge: By Monday of Jan. 10, students will have learned about
- The history of DNA discoveries.
- DNA structure and how it codes for messenger RNA (transcription).
- How messenger RNA codes for transfer RNA (translation) and amino acid chains (proteins).
- The general structure of chromosomes, replicated chomosomes, chromatids, and centromeres.
- How to analyze family pedigrees for dominant, recessive, and sex-linked inheritance.
- DNA mutations and chromosomal mutations.
Anticipatory Set: Students will be asked to complete the graphic organizer they began on Friday of the previous week while I take attendance. I will then give them examples of each of the 7 types of mutations on their concept map.
Lesson Goal: Students will discover variations on how DNA and Chromosomes can change and thus make changes in the expression of an offspring.
State Standards :
4c: Students know how mutations in the DNA sequence of a gene may or may not affect the expression of the gene or the sequence of amino acids in an encoded protein
2f: Students know the role of chromosomes in determining an individual’s sex.
Lesson Body:
- Students will complete a graphic organizer of DNA and chromosomal mutations.
- Students will be shown and write down examples of each type of mutation.
- Students will be given pictures of human chromosomal sets (karyotypes). Normal for male and female will be illustrated.
- Students will be introduced to chromosomal disorders resulting from nondisjunction (monosomy and trisomy) using a short video clip.
- Students will be given a picture of chromosomes, they will match them up by cutting them out, pairing them with their homolog, and will determine what disorder the individual has. Different student groups will have different karyotypes.
- The results will then be shared with the class .
Assessment:
- Informal assessment will occur as the instructor observes progress on graphic organizers and progress on karyotype sheets.
- Students will be given 30 pts credit for complete graphic organizers of mutations.
- Students will be given 20 pts credit for properly completed karyotypes of human chromosomes.
- Students will take a matching, fill in the blank, multiple choice, and essay exam later in the week over this unit's material.
Resources Needed:
Web site that will have links to the lesson: http://kenpitts.net/bio/genetics_2nd_qutr.htm
Colored pencils, paper, and rulers for graphic organizer.
Multimedia project
Biolix video clip from United Streaming on nondisjunction in meiosis
Computer with web access (wireless)
Karyotype chromosome pictures of various disorders
Time Needed:
I believe this lesson can be completed in one 2 hour block.