Quiz about Genetics and Pedigree Charts

Question 1

What is this?

Accepted Answer

Pedigree

Answer

Karyotype

Answer

Venn diagram

Answer

Punnett Square

Question 2

How many females show the trait?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 3

How many females are in this pedigree?

Accepted Answer

7

Answer

3

Answer

4

Answer

6

Question 4

What is a pedigree chart used for in genetics?

Accepted Answer

To track the inheritance of traits through generations

Answer

To determine the age of fossils

Answer

To measure the length of DNA strands

Answer

To identify the sequence of nucleotides in DNA

Question 5

How many of the males in this pedigree show the trait being studied?

Accepted Answer

3

Answer

2

Answer

4

Answer

6

Question 6

How many generations are shown in this pedigree?

Accepted Answer

4

Answer

1

Answer

2

Answer

3

Question 7

Gregor Mendel developed some basic principles of heredity by ______________.

Accepted Answer

crossing pea plants

Answer

breeding fruit flies

Answer

cutting off the tails of mice

Answer

growing bacteria in a laboratory

Question 8

Phenotype refers to the _________ of an individual

Accepted Answer

physical appearance

Answer

genetic makeup

Answer

recessive alleles

Answer

dominant alleles

Question 9

Which of these would best be described as a phenotype?

Accepted Answer

blue eyes

Answer

mutation

Answer

Bb

Answer

Tt

Question 10

Dominant alleles are represented by a:

Accepted Answer

capital letter

Answer

Male gene

Answer

lowercase letter

Answer

recessive trait

Question 11

Which term correctly describes an individual with a pair of the same alleles for a trait?

Accepted Answer

homozygous

Answer

homologous

Answer

heterozygous

Answer

heterologus

Question 12

An individual with two different alleles for a specific trait is said to be _____________.

Accepted Answer

heterozygous

Answer

homozygous

Answer

heterogenous

Answer

homogenous

Question 13

What is the phenotype for the recessive trait?

Accepted Answer

blue eyes

Answer

brown eyes

Answer

green eyes

Question 14

Look at the Punnett Square. What's the probability of having the recessive offspring?

Accepted Answer

50%

Answer

100%

Answer

75%

Answer

25%

Question 15

Of 12 hamsters just born, 9 have brown fur and 3 have white fur. The trait for white fur is considered to be ________.

Accepted Answer

recessive

Answer

weak

Answer

strong

Answer

dominant

Question 16

What is the primary use of a pedigree chart in genetics?

Accepted Answer

To trace the inheritance of specific traits through several generations.

Answer

To predict the weather patterns for agricultural purposes.

Answer

To record the personal preferences of individuals in a family.

Answer

To determine the age of individuals in a family tree.

Question 17

What does a filled square or circle represent in a pedigree chart?

Accepted Answer

A filled square or circle represents an individual with the trait.

Answer

A filled square or circle represents an individual without the trait.

Answer

A filled square or circle represents an individual who has not been tested for the trait.

Answer

A filled square or circle represents an individual with an unknown trait.

Question 18

How can pedigree charts help in understanding the inheritance pattern of a genetic disorder?

Accepted Answer

By observing the distribution of the disorder across different generations and individuals in the pedigree chart, inheritance patterns can be deduced.

Answer

By performing genetic tests on individuals represented in the pedigree chart.

Answer

By examining the physical traits of individuals represented in the pedigree chart.

Answer

By investigating the environmental influences that may affect the disorder in the pedigree chart.

Question 19

What method can be used to identify patterns of inheritance in a family tree for a specific genetic trait?

Accepted Answer

By using pedigree analysis to examine the presence or absence of the trait across generations and individuals.

Answer

By conducting physical examinations on family members.

Answer

By studying the lifestyle and habits of individuals in the family tree.

Answer

By conducting environmental studies on the family's living conditions.

Question 20

What does a Punnett square illustrate in genetics?

Accepted Answer

The possible genetic combinations resulting from a cross.

Answer

The probability of winning a lottery.

Answer

The process of photosynthesis in plants.

Answer

The results of a physics experiment.

Question 21

What is the primary function of a pedigree chart in genetics?

Accepted Answer

To trace the inheritance of specific traits through generations

Answer

To determine the genetic sequence of an individual

Answer

To analyze the environmental factors affecting traits

Answer

To calculate the probability of genetic mutations

Question 22

In a pedigree chart, what does a horizontal line connecting a square and a circle represent?

Accepted Answer

A marriage or mating relationship

Answer

A sibling relationship

Answer

An individual with a genetic disorder

Answer

A parent-child relationship

Question 23

Which of the following best describes a recessive trait in genetics?

Accepted Answer

A trait that is expressed only when two recessive alleles are present

Answer

A trait that is always expressed when present

Answer

A trait that is expressed in the presence of a dominant allele

Answer

A trait that is inherited from the mother only

Question 24

How can pedigree charts be used to predict the likelihood of an offspring inheriting a genetic disorder?

Accepted Answer

By analyzing the presence of the disorder in previous generations

Answer

By examining the physical traits of the parents

Answer

By conducting genetic tests on the parents

Answer

By studying the environmental conditions of the family

Question 25

What does a filled symbol (square or circle) typically indicate in a pedigree chart?

Accepted Answer

An individual affected by the trait

Answer

An individual who carries the trait

Answer

An individual who does not carry the trait

Answer

An individual with an unknown genetic status

Genetics and Pedigree Charts

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