1 UbD Lesson Plan/Multiple Allelism and Codominance/R.E.Lizardo/February 4, 2013

Stage 1 – Desired Results (What the students will know, do, and understand)

Established Goal : DepEd-prescribed competencies

4. Explain the Non-Mendelian patterns of heredity.

4.1. Infer that certain traits do not always follow the Mendelian principles of heredity.

Topical Enduring Understandings :

Students will understand that …

1. multiple allelism is a condition where more than

two alleles control a single trait, resulting to a greater variety of phenotypes for the trait;

2. codominance may result from multiple allelism, where neither of two alleles is dominant over the

other; this, in turn, results to the expression (or appearance) of the two phenotypes influenced by the two alleles; and

3. inheritance of the ABO blood types in humans exhibit both multiple allelism and codominance.

Topical Essential Questions :

1. Why are there inherited traits which are expressed in

more than two forms (phenotypes)?

2. What explains the coinciding expression or appearance of two phenotypes for a single trait in an

individual?

3. How are multiple allelism and codominance exhibited

in the inheritance of blood types in humans?

UbD-based Lesson Plan

Title of Unit : Genetics Grade Level : 8

Topic : Non-Mendelian Inheritance – Multiple Allelism and Codominance Time Frame : 1 day

Curriculum Area : Biology Designed by : Raquel E. Lizardo

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2 UbD Lesson Plan/Multiple Allelism and Codominance/R.E.Lizardo/February 4, 2013

Students will know …

1. definition of multiple allelism and codominance;

2. relationship between multiple allelism and codominace in the inheritance of a trait which does not follow the Mendelian pattern (i.e., inheritance of

ABO blood types); 3. possible combinations of three alleles (i.e., IA, IB and

i) resulting to different blood group genotypes and phenotypes

Students will be able to ...

1. construct and analyze Punnett squares showing the

inheritance of the ABO blood types.

Stage 2 – Assessment Evidence (Forms of assessment that will guide instruction)

Performance Task :

Goal – To prove before a court as to whether or not Juan

Manuel is a long lost son of Don Manny,

a prominent billionaire who recently died

Role – Lawyer of Rosalinda and Mercedes,

Don Manny’s two acknowledged children

Other Evidence :

1. Observations

2. Question and answer 3. Case analysis (by group) 4. Drill (problem set)

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Audience – Court Judge

Situation or context of scenario - Court hearing

Product for evaluation - Case narrative defending

your conclusion as a

lawyer, supported

by Punnett squares

Standards for evaluation - Refer to the appended

Rubric

* See Attachment 1 : Performance Task Narrative & Rubric.

Stage 3 – Learning Plan (Learning activities aligned with goals and assessment)

Introduction :

Think-Pair-Share : Students will read a news article about the death of woman due to wrong blood transfusion. By pair, the students will share their answers to two questions related to the article read (see Attachment 2 : News Article).

4 UbD Lesson Plan/Multiple Allelism and Codominance/R.E.Lizardo/February 4, 2013

Interaction :

Through direct instruction, students will be introduced to the concepts of “multiple allelism” and “codominance”.

The teacher will lead the students to the idea that the inheritance of the ABO blood types in humans is an example of multiple allelism and obeys the codominace pattern of inheritance.

Students will be taught how to solve problems on multiple allelism and codominance involving the inheritance

of blood types through the use of Punnett squares (see Attachment 3 : Sample Problems). Group Activity : “Blood Lineage” - Students will be divided into three groups. Each group will be asked to solve

a case about blood type identification of famous celebrities (see Attachments 4.1 and 4.2. : Student Activity Worksheet & Guide Pictures). Integration :

Students will complete a concept map to link the knowledge and ideas learned from the lesson (see Attachment 5 : Concept Map).

Values Integration :

Students will be asked to suggest the implication(s) of the following line :

“We are one family…the same blood runs through our veins…”

Introduction to the Performance Task (see Attachment 1 : Performance Task Narrative & Rubric) Assignment / Homework (see Attachment 6 : Problem Set)

5 UbD Lesson Plan/Multiple Allelism and Codominance/R.E.Lizardo/February 4, 2013

Closure Statement :

Multiple allelism and codominance are closely-linked patterns of inheritance which do not obey Mendelian laws; these patterns are observed in the inheritance of the ABO blood types in humans.

Materials : Charts, worksheets

Print & Web Resources :

Purves, W.K., et al.2001. Life : The Science of Biology (6th Edition). W.H. Freeman and Company : Massachusetts, USA.

http://learn.genetics.utah.edu/content/begin/traits/blood/

http://www.carolina.com/text/teacherresources/instructions/biotech/blood_group_genetics_manual.pdf http://www4.uwsp.edu/education/pcook/unitplans/genetics.htm

http://ljhs.sandi.net/faculty/SBrammer/Biology/Biology_Labs/chap%208/Who%27s%20Your%20Daddy.pdf