Interactive multiple-choice quiz: Mendelian Genetics Question Bank

A

They grow quickly and have large flowers

B

They are true breeding (pure) and their pollination can be controlled (self-pollination and cross-pollination)

C

They reproduce asexually, producing identical offspring

D

All of their traits are controlled by dominant alleles only

A

To increase the number of ovules in the ovary

B

To make sure the female flower is true breeding

C

To prevent the recessive trait from appearing in the offspring

D

To prevent self-pollination in the receiving flower

A

Its genotype is Pp because it shows the dominant trait

B

Its genotype cannot be determined at all

C

Its genotype is pp because the offspring look like it

D

Its genotype is PP and it is true breeding

A

A mutation occurred in the F₁ plants

B

Self-fertilization produces new alleles

C

Green became the dominant trait in the F₂ generation

D

The green-seed allele was present in F₁ but was masked by the dominant allele

A

Shapes (1) and (3) have the same genotype

B

Shapes (1) and (3) have the same phenotype but different genotypes

C

Shape (3) produces only one type of gamete

D

Shape (2) is heterozygous

A

One of its parents was tall

B

Its stem is taller than usual

C

A short plant appeared among its offspring when it self-fertilized

D

All its offspring from a cross with a true-breeding tall plant were tall

A

Stage B — mitosis

B

Stage A — fertilization

C

Stage B — meiosis

D

Stage A — meiosis

A

Green pod and wrinkled seeds

B

Yellow pod and round seeds

C

Yellow pod and wrinkled seeds

D

Green pod and round seeds

A

TT — tall

B

Tt — tall

C

Tt — short

D

tt — short

A

0

B

100

C

200

D

300

A

All yellow

B

3 green : 1 yellow

C

Half green and half yellow

D

All green

A

1/2

B

1/4

C

1/8

D

1/16

A

The two plants have the same genotype and phenotype

B

The two plants have different phenotypes

C

Both plants are heterozygous

D

The two plants have the same phenotype but different genotypes

A

1/4

B

1/2

C

2/3

D

3/4

A

$0\%$

B

$25\%$

C

$50\%$

D

$75\%$

A

$25\%$

B

$50\%$

C

$75\%$

D

$100\%$

A

1

B

2

C

4

D

9

A

2

B

4

C

6

D

8

A

The small frame to obtain F₁, and the large frame to obtain F₂

B

The large frame to obtain F₁, and the small frame to obtain F₂

C

The large frame to obtain both generations

D

The small frame to obtain both generations

A

0%

B

25%

C

50%

D

100%

A

0

B

15

C

30

D

45

A

9:3:3:1

B

3:1

C

1:1:1:1

D

1:2:1

A

1 purple : 1 white

B

3 purple : 1 white

C

All purple

D

All white

A

Offspring inherit dominant traits from the father only

B

Segregation and independent assortment of alleles during gamete formation produce different combinations

C

Each child has a genotype identical to one of the parents

D

Recessive traits are not passed to the offspring

A

Cross 1

B

Cross 2

C

Cross 3

D

Crosses 2 and 3

A

Cc — $50\%$

B

CC — $100\%$

C

Cc — $75\%$

D

cc — $0\%$

A

1

B

3

C

4

D

9

A

20

B

35

C

79

D

105

A

Genetic ratios are probabilities and the number of offspring is small; the larger the number of offspring, the closer the results to 3:1

B

The original plant’s genotype was yy

C

The result disproves Mendel’s law of segregation

D

Green is dominant over yellow

A

aaBb × Aabb

B

AaBb × aabb

C

AaBb × AaBb

D

AABB × aabb

A

Cross it with a YY plant and get yellow seeds only

B

Cross it with a Yy plant and get yellow seeds only

C

Cross it with a yy plant and get green seeds among the offspring

D

Cross it with a yy plant and get yellow seeds only

A

True-breeding tall × true-breeding tall $\to F_1$ all tall $\to$ self-fertilize $\to$ 3 tall : 1 short

B

True-breeding tall × true-breeding short $\to F_1$ all tall $\to$ self-fertilize $F_1 \to$ 3 tall : 1 short

C

True-breeding tall × true-breeding short $\to F_1$ half short $\to$ self-fertilize $\to$ 1 tall : 1 short

D

Short × short $\to F_1$ all short $\to$ self-fertilize $\to$ 3 short : 1 tall