Inherited What?


 

Lesson Title:  Martian Genetics                                                  STAGE OF LEARNING CYCLE: 6

 

 

LESSON OVERVIEW

Performance based assessment:

INSTRUCTIONAL GOALS

Performance assessment to ‘see’ retention of genotype and phenotype and crossbreeding using   

 TN STANDARDS

Differentiate between dominant and recessive traits.
8.4.3
Predict the genotypes of offspring in a monohybrid cross using a punnett square.
8.4.4

 

 

FORMATIVE ASSESSMENT

Student participation. Correct and Uncorrect answers. Do I need to re-teach any area.

LESSON ORGANIZATION

Opening the Lesson:
5  minutes

See sheet below for students.  Students will be creating mystery martians or creating living Punnett Squares.  Split students into their teams and assign a life size Punnett Sqaure.

Developing the Lesson:
35  minutes

Students will be asked questions. They need to form their living Punnett Square. They will assesmble themselves in order to anwer the question and ring their bell when ready for teacher approval.

Closing the Lesson:
5 minutes

Give the score of the competition. Remind them of their written test tomorrow. This was the performance based test today.   Be sure to give their score from today.

TEACHING RESOURCES

See below.

LAB SAFETY

Enough space for life size squares and for students to move around safely.

ACCOMMODATIONS FOR SPECIAL LEARNERS

N/A

 

Living Punnet Square Lab (Genetics)
By - Shannon Harrington
Primary Subject - Science
Grade Level - 8 - 12

** Pre-Set Up - Create manila folders w/ the correct genotypic card options for the crosses below (adding more for confusion). Tape out blank Punnet squares on the floor of the classroom for ease and create 6+ groups of 4 students for the living lab. Students are to break down the cross and create a living Punnet square. They may not move on to the next question without approval from the teacher. I had my students do it in a competition between groups, which made it fun.

 

MARTIAN GENETICS!!
Building a Living Punnet Square

Directions: Using the traits listed below, build a Punnet square for the following crosses. Use this activity to understand how each parent contributes one allele to the offspring. Build the Punnet squares using the grid marked on the floor. The folders have the possible allele combinations. Use white boards for practice if necessary. Good luck!

Traits:

  • One Eye (E) vs. Two Eyes (e)
  • Three Fingers (F) vs. Two Fingers (f)
  • Green Skin (G) vs. Blue skin (g)
  • Two Antennae (A) vs. One Antennae (a)

Questions:
1. Homozygous dominant male for eyes mates with a heterozygous female. What are the genotypes of her offspring? Build the living Punnet square and when you’re ready, call for the teacher.

2. Two heterozygous for fingers Martians marry and have four kids. How many of their kids will have three fingers? How many will have two? Build the living Punnet square and when you’re ready, call for the teacher.


3. A homozygous recessive for skin color female Martian has children with a heterozygous male. What are the genotype possibilities for her four children? Build the living Punnet square and when you’re ready, call for the teacher.

4. A homozygous dominant for antennae mates with a homozygous recessive female. What phenotypes are shown in their four children?

5. A male Martian that is heterozygous for fingers marries a female martin that is homozygous recessive. What are the chances (in %) that their children will be heterozygous?

 
         

 

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