Quiz about Genetics

Question 1

The study of ____ is called genetics.

Accepted Answer

heredity

Answer

dominance

Answer

pea plants

Answer

mutations

Question 2

Genes come from

Accepted Answer

parents

Answer

nature

Answer

our environment

Answer

the store

Question 3

The _____________________ represents the appearance of an organism.

Accepted Answer

phenotype

Answer

genotype

Answer

chromosome

Answer

gene

Question 4

What trait is represented by a capitol letter and always shows up in an organism when the allele is present?

Accepted Answer

dominant

Answer

probability

Answer

learned

Answer

recessive

Question 5

How many alleles does an offspring receive from each parent to determine a specific trait?

Accepted Answer

one

Answer

two

Answer

three

Answer

four

Question 6

Where is the majority of DNA stored within a cell?

Accepted Answer

nucleus

Answer

cell membrane

Answer

mitochondria

Answer

cytoplasm

Question 7

Which of the following in NOT an example of a trait?

Accepted Answer

species

Answer

eye color

Answer

ear shape

Answer

body height

Question 8

What model can be used to show traits and help determine genotypes of genetically related family members over several generations?

Accepted Answer

pedigree

Answer

Punnett square

Answer

ratio

Answer

phenotype

Question 9

What trait is represented by a lowercase letter and hidden whenever the dominant allele is present?

Accepted Answer

recessive

Answer

dominant

Answer

heterozygous

Answer

phenotype

Question 10

Which of the following is a phenotype?

Accepted Answer

brown eyes

Answer

BB

Answer

bb

Answer

Bb

Question 11

A child looks more like one parent than the other because a child only inherits

chromosomes from one parent.

Accepted Answer

False

Answer

True

Question 12

G=green, g=yellow

The genotype for a yellow plant would be:

Accepted Answer

gg

Answer

GG

Answer

Gg

Answer

all of the above

Question 13

What is true when a dominant and a recessive gene are present?

Accepted Answer

You will see the dominant trait.

Answer

You will see the recessive trait.

Answer

You will see both traits.

Answer

You will see neither trait.

Question 14

On a pedigree, what do circles represent?

Accepted Answer

females

Answer

males

Answer

organism has the trait

Answer

organism does not have the trait

Question 15

Tt represents which type of trait?

Accepted Answer

heterozygous

Answer

homozygous dominant

Answer

homozygous recessive

Answer

none of the above

Question 16

Two brown eyed parents who each have the genotype Bb have a baby. What is the probability that they will have a blue eyed baby?

Accepted Answer

25%

Answer

0%

Answer

50%

Answer

75%

Question 17

When Mendel crossed a true-breeding plant with purple flowers and true-breeding plant with white flowers, ALL offspring had purple flowers. The best explanation for this data is that the white flowers are:

Accepted Answer

recessive

Answer

dominant

Answer

heterozygous

Answer

neutral

Question 18

On a Punnett Square, two capital letters indicate a gene that is

Accepted Answer

homozygous dominant

Answer

heterozygous

Answer

homozygous recessive

Answer

none of the above

Question 19

Plant A has round seeds with a genotype of RR and Plant B has wrinkled seeds with a genotype of rr. What type of seeds would result from this cross?

Accepted Answer

100% round

Answer

100% wrinkled

Answer

50% round

Answer

25% wrinkled

Question 20

A florist has one kind of plant that usually has red flowers (the dominant trait), but sometimes has white flowers (the recessive trait). If she crosses plants A and B as shown here in the Punnett Square, what percentage of the plants will be red?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

100%

Question 21

A heterozygous red-flowered plant is crossed with a homozygous white-flowered plant. If red is a dominant allele and white is recessive, what color ratio will the flowers of the offspring plants have?

Accepted Answer

2 red: 2 white

Answer

1 red: 3 white

Answer

4 red: 0 white

Answer

0 red: 4 white

Question 22

Using the Punnett Square, what is the probability that the offspring will have the dominant trait?

Accepted Answer

75%

Answer

25%

Answer

50%

Answer

100%

Question 23

Using the Punnett Square, what belongs in the empty box?

Accepted Answer

aa

Answer

AA

Answer

Aa

Answer

aA

Question 24

Using the Punnett Square, what genotype would be in the bottom right box?

Accepted Answer

bb

Answer

BB

Answer

Bb

Answer

bB

Genetics

25 questions

The study of ____ is called genetics.

Genes come from

The _____________________ represents the appearance of an organism.

What trait is represented by a capitol letter and always shows up in an organism when the allele is present?

How many alleles does an offspring receive from each parent to determine a specific trait?

Where is the majority of DNA stored within a cell?

Which of the following in NOT an example of a trait?

What model can be used to show traits and help determine genotypes of genetically related family members over several generations?

What trait is represented by a lowercase letter and hidden whenever the dominant allele is present?

Which of the following is a phenotype?

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