Punnett squares
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Punnett squares. The tool which uses the combination of genes to predict the traits showing up in offspring. Green eyes are dominant and yellow eyes are recessive. The genotype of two insects are Gg and Gg. Complete a Punnett square!. g. G. GG. G. Gg. ??. g. Gg. ?? = gg.

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Punnett squares

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Punnett squares

Punnett squares


Punnett squares

The tool which uses the combination of genes to predict the traits showing up in offspring.


Punnett squares

Green eyes are dominant and yellow eyes are recessive. The genotype of two insects are Gg and Gg.

Complete a Punnett square!


Punnett squares

g

G

GG

G

Gg

??

g

Gg

?? = gg


Punnett squares

What % of the young would have green eyes?

75%

Yellow eyes?

25%


Punnett squares

If B=black and b=brown and two wolves are hybrid Bb and purebred bb what would their young be?

Complete a Punnett square!


Punnett squares

b

B

Bb

b

bb

bb

b

Bb


Punnett squares

What % of young would be black and what % would be brown?

Black = 50 %

Brown = 50 %


Punnett squares

B=Brown eyes which are dominant, b=blue eyes which are recessive

What are the alleles of the parents for the following chart?


Punnett squares

b

B

BB

B

Bb

b

bb

Bb


Punnett squares

The parents would be Bb and Bb and both would have brown eyes!


Punnett squares

Curly hair is dominant, and a couple have curly hair. How many of their babies will have curly hair?


Punnett squares

A. All of the babies B. Probably most of the babiesC. None of the babies

Answer - B


Punnett squares

What percent of your genes come from each parent?

50%


Punnett squares

What % of genes come from each grandparent?

25%


Punnett squares

If green snake skin is dominant and yellow is recessive, what are the alleles of the parent snakes for the following:


Punnett squares

G

G

Gg

g

Gg

g

Gg

Gg


Punnett squares

Homozygous (GG) green

Homozygous (gg) yellow


Punnett squares

How many different Punnett squares can you think of?


Punnett squares

If big ears are dominant and both parents are homozygous dominant, what percent of babies will have big ears?


Punnett squares

E

E

EE

E

EE

EE

E

EE


Punnett squares

100%


Punnett squares

Three fingers is dominant and five fingers recessive. If mom is homozygous dominant and dad is heterozygous,what percent of young will have three fingers?


Punnett squares

F

F

FF

F

FF

Ff

f

Ff


Punnett squares

100%


Punnett squares

Big noses are dominant and little noses are recessive. If Dad is homozygous dominant and mom is homozygous recessive, what percent of children will have big honkers?


Punnett squares

N

N

Nn

n

Nn

Nn

n

Nn


Punnett squares

100%


Punnett squares

Short is dominant and tall is recessive. If dad is heterozygous dominant and mom is homozygous recessive, what percent of the children will be short and tall?


Punnett squares

s’

S

Ss’

s’

s’s’

s’s’

s’

Ss’


Punnett squares

50% short

50% tall


Punnett squares

Long neck is dominant and short neck is recessive. If dad is heterozygous dominant and mom is heterozygous dominant, what percent of the children will have long necks and short necks?


Punnett squares

n

N

NN

N

Nn

nn

n

Nn


Punnett squares

75% Long

25% Short


Punnett squares

Short tongues are dominant and long are recessive. If mom is homozygous recessive and dad is homozygous recessive, what percent of the children will have long tongues?


Punnett squares

t

t

tt

t

tt

tt

t

tt


Punnett squares

100%


Punnett squares

Thank you


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