bk-1 phenotype and genotype rpt

8/3/2019 BK-1 Phenotype and Genotype RPT

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Lab Report Assistant: This document is not meant to be a substitute for a formal laboratory

report. It is simply a summary of the experiment’s questions and data tables which should be

addressed in a formal lab report. The intent is to facilitate student’s writing of lab reports by

providing this information in an .rtf format, which can be copied and pasted into an electronicdocument.

Phenotype and Genotype

Exercise 1: Observing Phenotype Characteristics

Data Table 1. Phenotype and Genotype

TraitPhenotype

Characteristics

Phenotype&

Genotypefrom

Parent 1

Phenotype&

Genotype(s)from

Parent 2

Offspring:

Dimpled chin Dimpled chin isdominant.

• D = Dimples

• dd = No dimples

Dimpledchin

Dd

Free ear lobe Free (unattached) ear lobe is dominant;

attached is recessive.

• A = Unattached

• aa = Attached

Attachedear lobe

aa

Ability to tastePTC strips

Ability to taste PTC isdominant; inability to

taste is recessive.

• P = Taste

• pp = Cannot taste

Ability totaste

Pp

Interlockingfingers Left thumb over right isdominant; right thumbover left is recessive.

• F = Left over right

• ff = Right over left

Right thumbover left

ff



Mid-digital hair

Hair on the joints of fingers is dominant; no

hair is recessive.

• H = Hair on joints

• hh = No hair

Hair on joints

HH

Bent little finger Little finger bending intowards ring finger isdominant; no bend is

recessive.

• B = Bent

• bb = Straight

Little finger bends

Bb

Widow’s peak

Hairline coming to apoint in center of

forehead is dominant;straight hairline is

recessive.

• W = Widow’speak

• ww = Straighthairline

Straighthairline

Ww

Hitchhiker’sthumb

Straight thumb isdominant; ability to bendthumb back more than

90° is recessive.

• T = Bent thumb

• tt = Straightthumb

Bent thumb

TT

Blue or green

eyes

Brown eyes are

dominant; blue or greeneyes are recessive.

• E = Brown eyes

• ee = Blue or green eyes

Green eyes

ee







Rolled tongue Ability to roll tongue isdominant; flat tongue is

recessive.

• L = Rolled tongue

• ll= Flat tongue

Rolled

tongue

Ll

Prepared Punnett Squares: There are 20 squares provided; 2 for each trait.

Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2

Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2



Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2

Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2

Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2

Parent 1 Parent 1







P

a

r

en

t

2

P

a

r

en

t

2



Parent 1 Parent 1

P

ar

e

n

t

2

P

ar

e

n

t

2

Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2

Parent 1 Parent 1

P

a

r

e

n

t

2

P

a

r

e

n

t

2

Parent 1 Parent 1







P

a

r

en

t

2

P

a

r

en

t

2

Questions:

A. As “Parent 2,” how many recessive traits did you express? What were they?

B. As “Parent 2,” how many dominant traits did you express? What were they?

C. While the traits studied in Exercise 1 were hypothetical genetic traits, what type of genetic traits do you think are important to study and predict? Give an example of agenetic trait that is carefully monitored when two parents are creating an offspringand why it would be important to monitor.

bk-1 phenotype and genotype rpt

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