T.J. MurphyBenton Community High School Biology

Paul MuganWaverly Shell Rock High School Biology

PETE X DIXIEChocolate lab X Black lab

BLACK OR CHOCOLATESimple Dominance

Black (BB or Bb)

Chocolate (bb)

T

BLACK OR CHOCOLATESimple Dominance BBxbb

B Bb Bb Bbb Bb Bb

T

BLACK OR CHOCOLATESimple Dominance BbxBb

B bB BB Bbb Bb bb

T

YELLOW ?An Epistatic Gene

E_ = Coat color ON

Black or Chocolate

ee = Coat color OFF

YellowP

YELLOW ?Cross of Ee x Ee

E e

E EE Eee Ee ee

P

LAB GENOTYPES

Black Lab?

Chocolate Lab?

Yellow Lab?

P

B_E_

bbE_

_ _ee

Combined genes dihybrid

B E

be BbEe

Cross of BBEE x bbee

T

The DihybridCross of BbEe x BbEe

BE Be bE be

BE BBEE BBEe BbEE BbEe

Be BBEe BBee BbEe Bbee

bE BbEE BbEe bbEE bbEe

be BbEe Bbee bbEe bbeeT

A RATIO VARIATIONCross of BbEe x BbEe

9 BLACK LABS

4 YELLOW LABS

3 CHOCOLATE LABST

SAMPLE CROSSCross BbEe x bbEe

BE Be bE be

bE BbEE BbEe bbEE bbEe

bE BbEE BbEe bbEE bbEe

be BbEe Bbee bbEe Bbee

be BbEe Bbee bbEe BbeeT

        1. Donnybrooks Homeboy

      1. Leeser's Long Range Sniper Black GENOTYPE

      Black GENOTYPE: 2. Black Lace

    1. Big River Alex The First   Black GENOTYPE:

    Black   3. Nimbar's River's N Valleys

      2. Grinde's Samantha Black GENOTYPE:

      Black GENOTYPE 4. Nimbars Valley Ying-Yang

  1. Black Bailey Of Big River     Black GENOTYPE:

  Black GENOTYPE:     5. Duke Of Vesper

      3. Viper Of Plum Hollow Black GENOTYPE

      Yellow GENOTYPES 6. Little Duchess Of Godfrey

    2. Tiffany Hope Jansen   Yellow GENOTYPE:

    Black GENOTYPE   7. Vaassen's Duke

      4. Josie Lee's Gerlich Black GENOTYES

      Black GENOTYES 8. Lange's Maggie

1. Schulteland's Dixie       Black GENOTYPE

Black GENOTYPE:       9. Dutch's Little Grizzley Boy

      5. Big Boy Trooper Chocolate GENOTYPE:

      Chocolate GENOTYPES 10. Five Seasons Corky

    3. Sam Best Chance   Chocolate GENOTYPE:

    Chocolate GENOTYPE:   11. Buffalo Bill VI

      6. Buffalo Sady Cinder Chocolate GENOTYPE

      Chocolate GENOTYPE: 12. Contessa Loo Cinder

  2. Lucky's Little Ace     Black GENOTYPE:

  Chocolate GENOTYPE:     13. Rovin Cody Brown MH

      7. River Valley's Scooter Chocolate GENOTYPE:

      Chocolate GENOTYPES 14. Weberpal's Brown Bullet

    4. Princess Rose Milhirsch   Chocolate Genotypes

    Chocolate GENOTYPE:   15. Yaphire Duke Of Smpter

      8. Hoofbeat's Sweet Cinders Chocolate GENOTYPE:

      Black GENOTYPE: 16. Lady Elizabeth XXXII

        Black GENOTYPE:

        1. Hares Chocolate Chip      1. Maxwell Mousse Chocolate GENOTYPE:

      Chocolate GENOTYPE: 2. Hershi Choco Terrill

    1. Hershies Mocco Delight   Chocolate GENOTYPE:

    Chocolate GENOTYPE:   3. Bo-Jo's Chocolate      2. Maggie Sue Kiefer Chocolate GENOTYPE:

      Chocolate GENOTYPE: 4. Tosha Marley

  1. J.R.     Chocolate GENOTYPE:

  Chocolate GENOTYPE:     5. Amos My Man

      3. Berners Handy Dan Black GENOTYPE:

      Chocolate GENOTYPE: 6. Berners Burnt Snow

    2. Gussies Dandy Lucy   Yellow GENOTYPE:    Chocolate GENOTYPE:   7. Mettlands Brown       4. Grizzley's Brown Chocolate GENOTYPE:

      Chocolate GENOTYPE: 8. Lucy's Mischief

1. Murphy's Pete       Yellow GENOTYPE:

Chocolate GENOTYPE       9. Paul Copper

      5. Jake's Bronze Yellow GENOTYPE:      Yellow GENOTYPE: 10. Paul's Penny    3. R Jacob Bettin   Yellow GENOTYPE:    Black GENOTYPE:   11. My Boy Roy      6. Mi Ginger Rogers Chocolate GENOTYPE:

      Chocolate GENOTYPE: 12. Tutie

  2. C Holly Peterson     Chocolate GENOTYPE:  Black GENOTYPE:     13. Chaz Bobby      7. Willow Creek's Chocolate GENOTYPE:

      Chocolate GENOTYPE: 14. Jeana Marie

    4. Ozark MTAbbycadabby   Chocolate GENOTYPE:

    Black GENOTYPE:   15. Niko Man       8. Willow Creek's Ink Chocolate GENOTYPE:      Black GENOTYPE: 16. Everett's Winnie        Yellow GENOTYPE:

PETE X DIXIEbbE_ x BbEE

bE b_

BE BbEE BbE_

bE bbEE bbE_

CLASSROOM RESOURCES

Introduction

Problems and information

CLASSROOM RESOURCES

Pedigree

Dixie’s pedigree with questions

CLASSROOM RESOURCES

Pedigree

Pete’s pedigree with questions

CLASSROOM RESOURCES

Website (on card)

Handouts and PowerPoint available digitally

Iowa Teaching StandardsStandard 2Demonstrates competence in content knowledge appropriate to the teaching position.

a.     Understands and uses key concepts, underlying themes, relationships, and different perspectives related to the content area.

d.     Understands and uses instructional strategies that are appropriate to the content area.

Standard 4Uses strategies to deliver instruction that meets the multiple learning needs of students.

e.     Connects students’ prior knowledge, life experiences, and interests in the instructional process.

Iowa Core Curriculum

Understand and apply knowledge of the molecular basis of heredity.

Organisms have two copies of each chromosome.

Variability occurs as a result of fertilization

Basic patterns of inheritance can be identified

R-4

Single discipline Interdisciplinary Real-World

Evaluation

Synthesis

Analysis

Application

Comprehension

Knowledge

MeiosisBasic GeneticsVocabularyPractice CrossesCoin flip

Segregation of AllelesDihybrid crosses

Labrador DihybridAnalyze Lab Pedigree

Probability

Introduce the DogsDiscuss Coat ColorsWho has a Lab?

B

D

A

C

RIG

OR

RELEVANCE