Quiz about Punnett Square

Question 1

Homozygous is when...

Accepted Answer

the alleles are the same

Answer

the alleles are different

Answer

the alleles are absent

Answer

the alleles are present

Question 2

Heterozygous is when...

Accepted Answer

the alleles are different

Answer

the alleles are the same

Answer

the alleles are absent

Answer

the alleles are present

Question 3

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

Accepted Answer

dominant

Answer

recessive

Answer

lower case letter

Answer

both

Question 4

T - tall and t = short
In the punnett square below, what belongs in the missing square

Accepted Answer

tt

Answer

Tt

Answer

Bb

Answer

TT

Question 5

B = brown fur b = white fur
In the punnett square, what is the probability for white fur?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 6

In the punnett square shown, what must the genotype of the missing parent be?

Accepted Answer

Bb

Answer

BB

Answer

bb

Answer

Tt

Question 7

In the punnett square shown, what is the genotypes of the two parents?

Accepted Answer

RR and WW

Answer

RW and RR

Answer

RW and WW

Answer

RW and RR

Question 8

Which of the following is a phenotype?

Accepted Answer

black hair

Answer

Aa

Answer

heterozygous genes

Answer

mutated DNA

Question 9

What is a dominant allele?

Accepted Answer

A trait that is always shown (capital letter)

Answer

A trait that can be hidden (lower case letter)

Answer

Alleles that are the same

Answer

Alleles that are different

Question 10

This image shows a...

Accepted Answer

Punnett Square

Answer

Phenotype

Answer

Genotype

Answer

Dominant allele

Question 11

What does heterozygous mean?

Accepted Answer

An organism that has different genes for a trait (Tt)

Answer

An organism that has the same genes for a trait (TT or tt)

Answer

When neither gene is fully dominant; offspring is a mixture of both

Answer

the different forms of a trait (hair color--> brown, blonde, red

Question 12

Which of the following genotypes is heterozygous?

Accepted Answer

Bb

Answer

BB

Answer

bb

Answer

B

Question 13

A characteristic that an organism can pass on to its offspring through its genes is ___________

Accepted Answer

Trait

Answer

Gene

Answer

Allele

Answer

Dominant

Question 14

Punnett squares can be used to predict the probability of:

Accepted Answer

having an inherited disease or a genetically determined physical trait

Answer

being exposed to a contagious disease and contracting it

Answer

Both

Question 15

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

Accepted Answer

100%

Answer

25%

Answer

0%

Answer

50%

Question 16

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

Accepted Answer

100%

Answer

25%

Answer

0%

Answer

50%

Question 17

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?

Accepted Answer

0%

Answer

25%

Answer

100%

Answer

50%

Question 18

Is it possible for a visible trait to skip a generation? Example: Blue eyes

Accepted Answer

Yes

Answer

No

Question 19

What is the probability of heterozygous offspring?

Accepted Answer

50%

Answer

25%

Answer

0%

Answer

100%

Question 20

What allele combination should go in the missing box?

Accepted Answer

Aa

Answer

AA

Answer

aa

Answer

none of these

Question 21

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?

Accepted Answer

RR or Rr

Answer

rr

Answer

R

Answer

RR

Question 22

What is the phenotype of the offspring? (A-Brown hair; a-blond hair)

Accepted Answer

75 % Brown Hair and 25% Blond Hair

Answer

50 % Brown Hair and 50% Blond Hair

Answer

25 % Brown Hair and 75% Blond Hair

Answer

0% Brown Hair and 100% Blond Hair

Question 23

A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color).

Accepted Answer

100 % brown

Answer

100 % tan

Answer

50 % brown and 50% tan

Answer

75 % brown and 25 % tan

Question 24

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

Accepted Answer

50%

Answer

25%

Answer

75%

Answer

100%

Question 25

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

Accepted Answer

25%

Answer

0 %

Answer

50%

Answer

75%

Question 26

If T=Tall & t=short, what is the genotypic ratio?

Accepted Answer

1:2:1

Answer

1:3

Answer

3:1

Answer

2:2

Question 27

B = brown fur b = white fur
In the Punnett square, what is the probability for white fur?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 28

A heterozygous yellow pea plant's genotype would be:

Accepted Answer

Yy

Answer

YY

Answer

yy

Answer

Yg

Question 29

B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?

Accepted Answer

Bb x Bb

Answer

BB x Bb

Answer

BB x bb

Answer

Bb x bb

Question 30

What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?

Accepted Answer

0 in 4

Answer

1 in 4

Answer

2 in 4

Answer

4 in 4

Question 31

What are the possible genotypes for this cross?
(Click the picture to see it without the text)

Accepted Answer

TT = 25% Tt= 50% tt=25%

Answer

all tall

Answer

TT= 75% tt = 25%

Answer

Tt = 100%

Question 32

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?

Accepted Answer

0%

Answer

25%

Answer

100%

Answer

50%

Question 33

What is the yellow seed genotype?

Accepted Answer

AA or Aa

Answer

aa

Answer

Aa

Answer

AA

Question 34

Purple (P) is dominant to the white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

Accepted Answer

100%

Answer

25%

Answer

0%

Answer

50%

Question 35

What is the genotypic ratio here?

Accepted Answer

BB = 25% Bb = 50% bb = 25%

Answer

25% blue eye 75 % brown eye

Answer

BB= 50 % bb = 50%

Answer

All brown eye

Question 36

What does a Punnett Square do?

Accepted Answer

predict genotypes and phenotypes in offspring

Answer

tell you exactly what your offspring will look like

Answer

increase the chance you pass on recessive traits

Answer

have no purpose but for Taylor to give us extra assignments

Question 37

Which of the following is homozygous dominant?

Accepted Answer

MM

Answer

Jj

Answer

Rr

Answer

ee

Question 38

Which of the following is homozygous recessive?

Accepted Answer

tt

Answer

Tt

Answer

TT

Answer

T

Question 39

What you see, or the physical appearance.

Accepted Answer

Phenotype

Answer

Genotype

Answer

Homozygous

Answer

Heterozygous

Question 40

What is the probability of heterozygous offspring?

Accepted Answer

50%

Answer

25%

Answer

0%

Answer

100%

Question 41

Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?

Accepted Answer

25%

Answer

1%

Answer

10%

Answer

0%

Question 42

G = green, g = yellow
The genotype for a yellow plant is...

Accepted Answer

gg

Answer

GG

Answer

Gg

Answer

all of the choices result in yellow

Question 43

Which of the following alleles is homozygous (purebred) recessive?

Accepted Answer

tt

Answer

Tt

Answer

TT

Answer

t

Question 44

What is a punnett square?

Accepted Answer

graph used to predict the possible genotypes of offspring in a given cross

Answer

a graph used to predict the possible birth rate of offspring.

Answer

a graph used to predict the possible behavioral characteristics an offspring could have

Answer

None of the above

Question 45

Genotype refers to the ...

Accepted Answer

the possible combination of alleles in a gene

Answer

physical expression of the genes

Answer

whether an allele is dominant or recessive

Answer

how an organism will appear

Question 46

A green pea plant (Gg) is crossed with a yellow pea plant (gg). Describe the genotype of the offspring. (Be sure to remember that the capital letter is dominant).

Accepted Answer

50% heterozygous and 50% homozygous recessive

Answer

50% heterozygous and 25% homozygous recessive

Answer

100% homozygous recessive

Answer

25% heterozygous and 50% homozygous

Question 47

A tall plant (TT) is crossed with a tall plant (Tt). What is the phenotype of the offspring?

Accepted Answer

50% homozygous dominant; 50% heterozygous; 100% tall

Answer

100% homozygous dominant; 100% tall

Answer

25% homozygous dominant; 75% heterozygous; 100% short

Answer

50% homozygous dominant; 50% heterozygous; 100% short

Question 48

A tall plant (Tt) is crossed with a short plant (tt). What is the genotype of the offspring?

Accepted Answer

50% heterozygous; 50% homozygous dominant

Answer

25% heterozygous; 75% homozygous

Answer

100% homozygous dominant

Answer

100% heterozygous

Question 49

A tall plant (Tt) is crossed with a short plant (tt). What is the phenotype of the offspring?

Accepted Answer

50% tall; 50% short

Answer

75% tall; 25% short

Answer

25% tall; 75% short

Answer

100% tall

Question 50

A white flower (rr) is crossed with a white flower (rr). What is the genotype of the offspring? Draw a Punnett square and answer the question.

Accepted Answer

100% homozygous recessive

Answer

100% homozygous dominant

Answer

100% heterozygous dominant

Answer

100% heterozygous recessive

Question 51

A black chicken (BB) is crossed with a black chicken (BB). What is the genotype and phenotype of the offspring? Draw a Punnet square and naswer this question.

Accepted Answer

100% homozygous dominant; 100% black

Answer

100% heterozygous; 50% black

Question 52

A red flower (Rd) is crossed with a white flower (rr). What is the genotype of the offspring? Draw a Punnett square and answer this question.

Accepted Answer

50% heterozygous; 50% homozygous recessive

Answer

50% heterozygous; 50% homozygous dominant

Answer

100% homozygous dominant

Answer

100% homozygous recessive

Question 53

A homozygous dominant brown mouse (BB) is crossed with a heterozygous brown mouse (tan is the recessive color). List the offspring genotype and phenotype.

Accepted Answer

50% homozygous dominant; 50% heterozygous and 100% brown

Answer

50% homozygous dominant; 50% heterozygous and 100% tan

Answer

25% homozygous dominant; 75% heterozygous; 100% brown

Answer

75% homozygous dominant; 25% heterozygous and 100% tan

Question 54

Two heterozygous white (brown fur is recessive) rabbits are crossed. What is their genotype?

Accepted Answer

25% homozygous domestic; 25% homozygous recessive; 50% heterozygous

Answer

50% homozygous dominant; 50% heterozygous

Answer

25% homozygous domestic; 75% homozygous recessive

Question 55

Two heterozygous red flowers (white flowers are recessive) are crossed. What is the genotype of the offspring?

Accepted Answer

25% homozygous dominant; 25% homozygous recessive; 50% heterozygous

Answer

75% homozygous dominant; 25% heterozygous

Answer

50% homozygous dominant; 50% heterozygous

Question 56

Two heterozygous red flowers (white flowers are recessive) are crossed. What is the phenotype of the offspring?

Accepted Answer

75% red; 25% white

Answer

50% red; 50% white

Answer

75% white; 25% red

Answer

25% red; 25% pink; 50% white

Question 57

A homozygous tall plant (TT) is crossed with a heterozygous tall plant (Tt) (short is the recessive phenotype). What are the genotypes and phenotypes of the offspring?

Accepted Answer

50% homozygous dominant; 50% heterozygous and 100% tall

Answer

100% homozygous dominant; 100% tall

Answer

25% heterozygous; 75% homozygous dominant and 100% tall

Question 58

A heterozygous white rabbit is crossed with a homozygous black rabbit. List the parent genotypes; draw and fill and Punnett square, and then list the offspring genotypes and phenotypes.

Accepted Answer

genotype- 50% heterozygous; 50% homozygous recessive and phenotype- 50% white and 50% black

Answer

genotype-25% heterozygous; 75% homozygous recessive and phenotype-50% white and 50% black

Question 59

Who is considered the "father of genetics"?

Accepted Answer

Gregor Mendel

Answer

Reginald Punnett

Answer

James Watson

Answer

Charles Darwin

Question 60

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

Accepted Answer

Tall = T
Short = t

Answer

Tall = T
Short = S

Answer

Tall = t
Short = T

Answer

Tall = TT
Short = tt

Question 61

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 62

Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?

Accepted Answer

Red

Answer

Blue

Answer

Purple

Answer

50% Red, 50% Blue

Question 63

A brown-furred ewok has 12 babies with a black-furred ewok. 9 ewok babies have black fur, while 3 ewok babies have brown fur. What are the probable genotypes of the parents?

Accepted Answer

Bb and Bb

Answer

BB and bb

Answer

BB and Bb

Answer

Bb and bb

Punnett Square

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