Quiz about Punnet square practice

Question 1

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 2

AA and Aa always show up as

Accepted Answer

dominant

Answer

recessive

Question 3

aa always shows up as

Accepted Answer

recessive

Answer

dominant

Question 4

Aa is

Accepted Answer

heterozygous

Answer

homozygous

Question 5

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 6

Which of the following genotypes is homozygous dominant?

Accepted Answer

AA

Answer

A

Answer

Aa

Answer

aa

Question 7

How many boxes would say BB?

Accepted Answer

0

Answer

1

Answer

2

Answer

4

Question 8

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 9

What allele combination should go in the missing box?

Accepted Answer

Aa

Answer

AA

Answer

aa

Answer

none of these

Question 10

If B = brown hair and b = blonde hair, what is the probability of brown hair?

Accepted Answer

75%

Answer

25%

Answer

50%

Answer

0%

Question 11

Black hair color is dominant to white hair color in mice.  Determine the phenotypic ratio for the offpring of a heterozygous black mouse and a white mouse.

Accepted Answer

2 Black: 2 White

Answer

4 Black: 0 White

Answer

3 Black: 1 White

Answer

0 Black: 4 White

Question 12

In a certain species of rabbits, black coat color is dominant over brown coat color. What is the probability of producing a rabbit with brown coat color from two rabbits that are both heterozygous for black coat color?

Accepted Answer

25%

Answer

0%

Answer

75%

Answer

100%

Question 13

Biologists have found that a form of deafness is a recessive trait in dogs. If a female dog that is heterozygous for the trait mates with a male dog that is deaf, what percent of their offspring will be deaf?

Accepted Answer

50%

Answer

0%

Answer

75%

Answer

100%

Question 14

Phenylketonuria (PKU) is inherited as a recessive condition. A man with PKU marries a woman without any alleles for PKU. What is the probability that their child will inherit PKU?

Accepted Answer

0%

Answer

25%

Answer

50%

Answer

75%

Question 15

In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has brown fur, what can you conclude about its genotype?

Accepted Answer

It is bb.

Answer

It is BB.

Answer

It is Bb

Answer

It is brown

Question 16

A ________________________ is used to predict the possible genotype from certain parents

Accepted Answer

Punnett Square

Answer

Mendel Grid

Answer

Genetic Tic Tac Toe

Answer

Pedigree Plot

Question 17

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 18

What percent of offspring will have the recessive trait?

Accepted Answer

25

Answer

50

Answer

75

Answer

100

Question 19

What is a phenotype

Accepted Answer

The physical trait

Answer

The genetic make up (code)

Question 20

What is the probability of heterozygous offspring?

Accepted Answer

50%

Answer

25%

Answer

0%

Answer

100%

Question 21

A man, who has red-green colorblindness, and his wife, who is a carrier for colorblindness, have a colorblind son. What is the probability that their next son will also be colorblind?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

100%

Question 22

What are the possible phenotype(s) 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

In pea plants: T=tall t=short

What ratio of the offspring could be short?

Accepted Answer

0 in 4

Answer

1 in 4

Answer

2 in 4

Answer

4 in 4

Question 24

What genotype would go in box 2?

Accepted Answer

Bb

Answer

BB

Answer

bb

Question 25

What is the probability of heterozygous offspring?

Accepted Answer

50%

Answer

0%

Answer

100%

Answer

25%

Question 26

What genotype would go in box 4?

Accepted Answer

bb

Answer

BB

Answer

Bb

Question 27

What is the possibility of this offspring having the dominant trait?

Accepted Answer

75%

Answer

50%

Answer

25%

Answer

0%

Question 28

Being tall or short are examples of _______________

Accepted Answer

Phenotype

Answer

Dominant

Answer

Homozygous

Answer

Genotype

Question 29

An organism's _______ describes its genetic composition. An organism's _______ describes its appearance or observable characteristics.

Accepted Answer

genotype; phenotype

Answer

phenotype; genotype

Answer

species; heredity

Answer

heredity; species

Question 30

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 31

What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?

Accepted Answer

25%

Answer

0%

Answer

50%

Answer

75%

Question 32

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 33

Leonardo bet his friend Olivet that two heterozygous green-eyed sea monsters could not have a recessive blue-eyed baby sea monster. Olivet said they can have a blue-eyed sea monster.
Who wins the bet?

Accepted Answer

Olivet

Answer

Leonardo

Answer

Both

Answer

Neither

Question 34

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

Question 35

Jabba the Hutt has finally decided to settle down and have a family. He has undergone genetic testing and learned that he is heterozygous for Hutt Fungal Syndrome, which is caused by recessive alleles. He is worried that his children might suffer from this syndrome. His Hutt mate has undergone genetic testing and discovered she is homozygous dominant for the syndrome. Should Jabba be worried?

Accepted Answer

No

Answer

Yes

Question 36

Bob the abominable snowman lives in the snowy Andes mountains. He has white fur, which blends in nicely. He is therefore dismayed when his mate keeps having red-furred babies. What is Bob's likely genotype?

Accepted Answer

Homozygous Recessive

Answer

Homozygous Dominant

Answer

Heterozygous

Punnet square practice

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