Warm UpPut bug lab on desk to be collected – turn in

drawing and chart

Write down and answer the following question in your notebook.

1. T = tall t = shortA. What are the 2 possible genotypes of a tall

person?B. What is the phenotype of a person with a tt

genotype?

1. T = tall t = shortA. What are the 2 possible genotypes of a tall

person? > TT or Tt

B. What is the phenotype of a person with a tt genotype?

Short

Notebook

Table of ContentsMarch 11 Punnett Squares 7.L.2.2

NotesMarch 11 Punnett SquaresHow does a Punnett Square help determine

patterns of heredity?

Vocab Review

Dominant Allele - represented using a capital letter.

Recessive Allele – represented using a lowercase letter

Genotype – combinations of letters

Phenotype – physical characteristics you can see

Vocab Review

Heterozygous – genotype with one capital and one lowercase letter

Homozygous – genotype with 2 capitals or 2 lowercase letters

7.L.2.2 Vocabulary

Punnett Square > A diagram that shows how parent’s alleles might combine in offspring

- Used to determine the potential genotypes and phenotypes of offspring

- Each box = 25% or 1/4

Ratio – two numbers that show the relationship between two amounts

* Written as number : number 5:4

Percentage – a ratio that compares a number to 100. ex – 50: 100 = 50%

Probability – percentage/chance that something will happen.

The probability of having an offspring with brown hair is 75% or there is a 75% chance

Steps to making a Punnett Square

How to complete a Punnett SquareStep 1 – draw the 4

square

Step 2 – put parent allele’s on the outside of Punnett square.

dad – topmom – left side

Male / Father alleles

B bFemale / Mom Alleles

b

b

Step 3. Distribute parent alleles

- Bring dad alleles down- Bring mom alleles across

Step 4. Determine ratio and probability/percentage

- Look at genotypes insideBb = 2 bb = 2

Ratio = 2:250% chance of brown eyes50% chance of blue eyes

Male / Father alleles

B bFemale / Mom Alleles

b

b

B

B

b

b

b b

b b

http://www.youtube.com/watch?gl=US&hl=en&client=mv-google&feature=fvwrel&v=prkHKjfUmMs&rl=yes&nomobile=1

B

b

B b

B B

B b

B b

b b

A homozygous dominant red rose crosses with a homozygous recessive pink rose. What are the possible offspring genotype and phenotypes?

1. Homozygous Dominant Red = RRHomozygous Recessive Pink = rr

Genotypes:4 will be Rr

Phenotypes100% of offspring be red

R R

r

r

Rr Rr

Rr Rr

Two heterozygous black cats (white cats are recessive) are crossed.

1. Heterozygous black = Bb

Genotypes25% = BB50% = Bb25% = bb

Phenotypes75% = black25% = white

B b

B

b

BB Bb

Bb bb

Let’s Practice

1. Punnett Square Worksheet2. Punnett Practice #1

• Complete worksheets on your own• When finished with 1 (both sides) check

answers at solution station – do not bring pens or pencils!!

1. A2. C3. B4. A5. B6. C7. C8. B9. D10. C11. A12. C13. C

Test Corrections14 – 21

- If marked wrong or ½, use notes to find correct answer. Write on separate sheet and turn in with test/

- Due Wednesday

Extra Credit1. Metaphase2. Prophase3. Telophase / Cytokinesis4. Interphase

Warm Up

Put HW on desk (Punnett Square Worksheet)WRITE ALL PARTS OF QUESTIONA homozygous dominant white dog crosses with a heterozygous white dog.

A. What are the possible genotypes?B. What are the offspring phenotypes?

A homozygous dominant white dog crosses with a heterozygous white dog.

Homozygous Dominant = HHHeterozygous = Hh

A. Genotypes = 2 HH, 2 HhB. Phenotypes = 100% white

H H

H HH HH

h Hh Hh

Exit Ticket ReviewA heterozygous male is crossed with a homozygous recessive female

(use the letter t)

Heterozygous = TtHomozygous recessive = tt

A. Genotypes = 2 Tt, 2 tt

B. Phenotypes =50% tall, 50% short

T t

t

t

Tt tt

Tt tt

HW Review

Homozygous Dominant = 2 capitalHeterozygous = 1 capital , 1 lowercase

Heterozygous = 1 capital, 1 lower case

Heterozygous = 1 capital, 1 lower case

Homozygous tall = 2 capitalsHeterozygous = 1 capital, 1 lowercase

Heterozygous white = 1 capital, 1 lower caseHomozygous black = 2 lowercase

Today’s Agenda1. Monster Punnett Squares2. Bikini Bottom Genetics3. Punnett Square Practice

• Complete front and back of each sheet

• Raise hand for answer sheet when finished

Heterozygous = different

Homozygous = same

Dominant = Capital

Recessive = Lowercase

Pure = homozygousHybrid = Heterozygous

Invent-An-Alien!Possible Phenotypes: S/s: Square head (S) or Round (s)E/e: Three eyes (E) or Five eyes (e)H/h: Horns (H) or No horns (h)G/g: Circle nose (G) or Triangle nose (g)A/a: Two antennae (A) or Three antennae (a)Y/y: Two eyebrows (Y) or Four eyebrows (y)T/t: Sharp teeth (T) or Flat teeth (t)

1. Use these seven characteristics to invent and draw your alien.2. Trade aliens with a partner.3. On the back of your partner’s paper, draw two chromosomes, each

with seven alleles. Label each chromosome with the alien’s alleles!

Warm Up

Put homework packet on desk

Complete Punnett Square Practice Handout (both sides) – no talking

Yesterday’s Behavior

Test = 2 people got above a 70, no one got an A or B

Your behavior hurts your overall grade

No more warnings – automatic consequences

1. A2. C3. B4. A5. B6. C7. C8. B9. D10. C11. A12. C13. C

Green Grade = test gradeBlue = Class Grade

Test Corrections14 – 21

- If marked wrong or ½, use notes to find correct answer. Write on separate sheet and turn in with test/

- Due Thursday

Extra CreditMetaphaseProphaseTelophase / CytokinesisInterphase

Warm Up

Put HW packet on desk

Write & Answer following question in your notebook

A homozygous recessive frog with spots is crossed with a heterozygous female with no spots. What is the probability of their offspring having spots? Create a Punnett square to solve

A homozygous recessive frog with spots is crossed with a heterozygous female with no spots. What is the probability of their offspring having spots?

Male = ffFemale = Ff

Spots = FThere is a 50% chanceOf their offspring having spots

f f

F Ff Ff

f ff ff

Yesterday’s ExitA heterozygous purple monster

crosses with a homozygous recessive blue monster

A. What are the two parent genotypes?

Pp ppB. What are the possible offspring

genotypes?2 Pp 2ppC. What are the possible offspring

phenotypes? 50% purple, 50% blue

P p

p

P

Pp pp

Pp pp

6.

7.

8.

2. True3. False4. C. Genotypes

1. E2. I3. H4. J5. C6. D7. B8. F9. G10. A

Warm Up

1. Take out all Leveled Curriculum work from yesterday

2. Begin silently working

Leveled CurriculumDue – End of class Today

Level C – Complete 2 with * and 1 of choice (3)

Level B - Complete 2 with * and 1 of choice (3)

Level A – Complete the 1 assignment

Directions• Test Grade• Work independently• Copying = 0 for both

people• When you finish a level

raise your hand to get signature

Alien Genetics

1. Select ONE male and ONE female alien from front page, circle them

2. Determine parent genotypes for each trait (write under directions)

- Skin Color - Eye Color - Height -

Superpower - Arms

Recessive = 2 lower caseDominant = you choose 2

capital or heterozygous

3. Complete Punnett Squares

4. Under Punnett Square write possible offspring phenotypes

5. Draw baby on back using traits from Punnett Squares

6. Explain the traits of your baby for EACH of the traits you made in the Punnett Squares

Warm UpPut packet from Friday on your deskWrite down the words below and an example of each

into your notebook (use the letter t)

1. Homozygous Dominant2. Homozygous Recessive3. Heterozygous4. Phenotype5. Genotype6. Inherited Trait7. Acquired Trait8. Allele

1. Homozygous Dominant > TT2. Homozygous Recessive > tt3. Heterozygous > Tt4. Phenotype > characteristic – hair color5. Genotype > combinations of alleles/letters in our

genes – tt6. Inherited Trait > something passed down ,eye color7. Acquired Trait > something you change or learn,

attitude 8. Allele > combinations of the same trait or gene

represented by a letter T

1. height, hair texture, freckles2. T, H, t, h3. Combinations of alleles4. Physical characteristics you can see5. Tt, Hh, Ff6. A capital letter7. A lowercase letter8. tt, hh, ff9. ff10. Tt

11. rr12. Short13. BB, Bb, bb14. HH = Right hand Hh= right hand hh = left15. Step 1 – Red: R White: rStep 2 – RR Rr rrRR = RedRr = redrr = white

16. Smooth: H Fluffy: hStep 2. HH Hh hhStep 3. HH = SmoothHh = Smoothhh = fluffy

Leprechaun Genetics

1. Luke = RRLola = Rr

100%

R R

R RR RR

r Rr Rr

Luke = Gg Lola = Gg

Green Eyes = 75%

G g

G Gg Gg

g Gg gg

Luke: LlLola : ll

50%

L l

l Ll ll

l Ll ll

Luke’s Dad – FFLuke’s Mom – FF

Lola’s Dad - ffLola’ Mom - ff

F F

F FF FF

F FF FF

f f

f ff ff

f ff ff

Luke - FFLola – ff

Freckles = 100%

F F

f Ff Ff

f Ff Ff

Luke = WwLola = Ww

50% Ww25% ww25% WW

W w

W WW Ww

w Ww ww

Hair – Red hairEyes – green eyesSkin Color- light skin Freckles - frecklesWidows Peak –has widows peak

1A. Parent 1 – WW Parent 2 – Ww

short whiskers = 0%

W W

W WW WW

w Ww Ww

1B

Short = 0%

W W

w Ww Ww

w Ww Ww

PDF

Part A1. Dominant = capital Letter2. Recessive = lower case3. Punnett Square = Diagram used to determine

possible offspring genotypes and phenotypes

Skill Challenge1. Heterozygous2. TT3. tt4. Tt5. ¼ b. ¼c. 2/4 or ½

QuizEyes on your own paperNo talking – stay in seat – raise your hand if you need

something

*when finished, raise hand• Work on something silently (read)

#4 – Hairy ears : recessiveWomen = heterozygous