Name:  Christina Stewart-Jordan

Subject:  Biology I - Genetics

Date:  July 10, 2008

Period:  3rd

Approximate Time:  50 minutes

Objective(s):

1.    TSW create Punnett Squares of gene inheritance (DOK 4, Biology 5.e).

2.    TSW create Pedigrees of gene inheritance (DOK 4, Biology 5.e).

Do Now:

In dogs, brown fur (B) is dominant to yellow fur (b).  What are the expected genotypes and phenotypes of the puppies created when a heterozygous dominant female dog is crossed with a homozygous recessive male?

(10 minutes)

Set:

TSW review the previous day's lesson by completing and discussing the Do Now.  TTW state that the students will practice creating Punnett Squares for their tests Friday.  After we are done practicing with Punnett Squares, we will read about Pedigrees and learn to create them, as well.  So, today we will be using the expected outcomes from the Punnett Squares we made to create a Pedigree of the expected outcome of the next generation of children.

(5 minutes)

Procedure:

1.    TTW will begin discussion of the Do Now.  TSW create their genotypes and phenotypes using ratios and fractions: genotypes- w/ fractions, phenotypes w/ ratios

[Say “down” & “across” when explaining and show ways to check answers.  Provide more problems for practice and extra credit- Due Fri]

2.    TTW pass out the Pedigree Analysis worksheet and randomly select students to read the paragraphs.  (15 minutes)

3.    TTW have the students create a Pedigree of the Do Now.  (3 minutes)  

4.    TTW select a student to display their pedigree on the board, to be discussed with the class.

(5 minutes)

5.    TSW begin working practice problems and extra credit work until the bell rings.

(12 minutes).

6.    Closure

Closure:

TTW state that today the students demonstrated their knowledge of genetics by creating Punnett Square crosses.  Then, the students used their knowledge of gene inheritance to create pedigrees, showing the possibility of certain traits being passed to from the parent to the offspring.  TTW review the day's lesson by prompting the students to explain aspects of the lesson that seemed less understood.

[Remind the students of their review tomorrow, and tell them that they can come in during their activity period for help studying for the test & completing their extra credit work.]

Class is dismissed!  (5 minutes)

Assessment/ Evaluation:

Objective(s):

1.  TSW create Punnett Squares of gene inheritance (DOK 4, Biology 5.e).

Informal:  TTW listen and watch (M) as the students create and explain different Punnett Squares of gene inheritance (C).

Formal:  TSW will be graded on their classwork and tested Friday (M) on their ability to create and explain Punnett Squares (C).  TTW record the grades in the grade book (D).

2.  TSW create Pedigrees of gene inheritance (DOK 4, Biology 5.e).

Informal:  TTW listen and watch (M) as the students create and explain different Pedigrees of gene inheritance (C).

Formal:  TSW will be graded on their classwork and tested Friday (M) on their ability to create Pedigrees for gene inheritance (C).  TTW record the grades in the grade book (D).