Name:  Christina Stewart-Jordan

Subject:  Biology I - Genetics

Date:  July 9, 2008

Period:  1st

Approximate Time:  100 minutes

Objective(s):

1.TSW demonstrate their knowledge of genetics by creating a smiley face (DOK 2, Biology 5.e).

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

Do Now:

In humans, brown eyes (B) are dominant to blue eyes (b).

1.What is the genotype of a homozygous dominant individual?  Heterozygous dominant?  Homozygous recessive individual?  [BB, Bb, bb]

2.What is the phenotype of a homozygous dominant individual?  Heterozygous dominant? Homozygous recessive individual?  [brown, brown, blue]

(10 minutes)

Set:

TSW review the previous day's lesson by completing and discussing the Do Now.  TTW state that the students will demonstrate their knowledge of genetics by creating a smiley face.  TTW state that the student will create genotypes and phenotypes of smiley faces, during their independent activity.  Then, the students will illustrate their creation. 

TTW ask students to name physical characteristics they share with their parents (remind them of the traits chart from last month, and demonstrate the Hitch-hiker's thumb trait inherited from Mom).

Today, we're going to create our own “kids”. 

(5 minutes)

Procedure:

1.TTW discuss individual procedures with the class.  No walking or talking to other people during the independent practice.  Otherwise, you will receive a zero for the assignment.  Work quietly and be respectful to your classmate.

2.TTW ask the students to clear their desks of everything except a pencil or pen. 

3.TTW hand out Activity #1, a blank sheet of paper, and 1 penny per student.  TTW go over the activity with the students.  (5 minutes)

4.TSW complete the activity.  (30 minutes)

5.TTW have the students present their “kid” to the class, stating which dominant and recessive genes their “kid” possesses.  (10 minutes)

6.TTW hand out Activity #2, and allow the students (selected randomly) to read each paragraph.  [TTW explain the importance of each paragraph after the student reads it & how the Punnett Square and pedigree allow us to see the chance of a person inheriting a gene or mutation.]

7.TSW complete the second activity, by creating a Punnett Square at the end of the activity.  TTW have the students create multiple Punnett Square crosses, for practice.  (35 minutes)

8.Closure

Closure:

TTW state that today the students demonstrated their knowledge of genetics by creating a smiley face.  Then, the students used their knowledge of gene inheritance to see the probability of a person inheriting a particular gene or mutation.  The teacher will review the day's lesson by having each person name one dominant trait and one recessive trait from their smiley faces.  TTW ask the students to state the difference between a genotype and a phenotype.  Then, the teacher will prompt the students to tell how we can estimate the chance of  person inheriting a particular gene [Punnett Square].  The next lesson will be on Pedigree Analysis, which is another way to see the chance of a person inheriting a particular gene or mutation.  Class is dismissed!  (5 minutes)

Assessment/ Evaluation:

Objective(s):

1.  TSW demonstrate their knowledge of genetics by creating a smiley face (DOK 2, Biology 5.e).

Informal:  TTW listen and watch (M) as the students define and demonstrate genotype, phenotype, and dominant and recessive alleles (C).

Formal:  TSW will be graded on their classwork and tested Friday (M) on their knowledge of dominant and recessive alleles (C).  TTW record the grades in the grade book (D).

2.  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 Punnett Squares (C).  TTW record the grades in the grade book (D).

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