Introduction to Genetics and Punnett Squares

Multiple Choice

Who is Gregor Mendel

• an Austrian Monk from the mid 1800s who contributed to the study of Genetics

• The scientist who discovered the structure of DNA

• a British scientist who discovered penicillin

• The scientist who used X-Ray Crystallography to shed light on the structure of DNA

Multiple Choice

A segment of DNA that codes for a trait

• gene

• centromere

• chromosome

• chromatid

Multiple Choice

an observable characteristic

• trait

• personality

• cell

• DNA

Multiple Choice

Genetic traits are determined by one or more

• genes

• organelles

• random chances

• cells

Multiple Choice

A version or variation of a gene

• trait

• gene

• allele

• DNA

Multiple Choice

The alleles that an organism has/inherits are its

• genotype

• phenotype

• chromosome

• recessive

Multiple Choice

The observable expression of a trait is its

• phenotype

• genotype

• chromosome

• allele

Multiple Choice

What is the definition of Phenotype?

• The diagram that shows all the chromosomes of an individual

• The combination of alleles that control that an individual has for a particular trait

• How many genes on one chromosome

• How a trait is expressed (what it looks like or what it does)

Multiple Choice

The passing of traits from parents to offspring is known as....

• hierarchy

• heredity

• traits

• genetics

Multiple Choice

How many alleles do you inherit from EACH parent for a specific trait?

• 1

• 2

Multiple Choice

Which of the following genotypes is homozygous dominant?

• A

• Aa

• AA

• aa

Multiple Choice

Which of the following genotypes is heterozygous?

• Bb

• BB

• bb

• B

Multiple Choice

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

• recessive

• dominant

• lower case letter

• both 

Multiple Choice

An example of a heterozygous gene is

• FF

• ff

• Ff

Multiple Choice

An example of a homozygous recessive gene is

• Dd

• DD

• dd

• DAB

Multiple Choice

An example of a homozygous dominant gene is

• Dd

• DD

• dd

• DAB

Multiple Choice

Dominant alleles are represented by a:

• Male gene

• lowercase letter

• recessive trait

• capital letter

Multiple Choice

Aa, DD, bB, yy are all examples of

• genotypes

• phenotypes

Multiple Choice

Which of the following genotypes is homozygous recessive?

• Tt

• tt

• TT

• tT

Multiple Choice

Codominant and incompletely dominant traits have three phenotypes instead of two. How many alleles (versions of the gene) are involved?

• 1

• 2

• 3

• 4

Multiple Choice

In snapdragons, flower color is an incompletely dominant trait. Which genotype will lead to a third blended phenotype?

• Homozygous dominant

• Heterozygous

• Homozygous recessive

Multiple Choice

In humans, curly hair is dominant to straight hair, and wavy hair is an intermediate texture. Which explanation most likely accounts for wavy hair?

• a mutation occurred, producing wavy hair

• a different set of genes resulted in wavy hair

• inheritance occurred through incomplete dominance

• inheritance occurred as a result of a gene from only one parent

Multiple Choice

In a certain breed of cattle, both red and white hairs show up together. This is an example of which type of inheritance pattern?

• incomplete dominance

• codominance

• multiple alleles

• polygenic inheritance

Multiple Choice

What is name for traits that are controlled by many genes such as height and skin color?

• complete dominance

• incomplete dominance

• co dominance

• polygenic

• multiple alleles

Multiple Choice

A child has blood type AB. Which blood types would his parents most likely have?

• B and O

• O and A

• A and B

• AB and O

Multiple Choice

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

• tt

• Tt

• Bb

• TT

Multiple Choice

Dominant or recessive?
tt

• Dominant 

• Recessive

Multiple Choice

What allele combination should go in the missing box?

• AA

• Aa

• aa

• none of these

Multiple Choice

This image shows a...

• Punnett Square

• Phenotype

• Genotype

• Dominant allele

Multiple Choice

What is the mother's genotype?

• DD

• Dd

• dd

Multiple Choice

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

• 0%

• 25%

• 50%

• 100%

Multiple Choice

How chance the offspring born from this cross will have a homozygous dominant genotype?

• 25%

• 50%

• 75%

• 100%

Multiple Choice

What goes in box 15

• aabb

• AABB

• aaBB

• AAbb

Multiple Choice

What goes in box 3

• Aabb

• AABB

• AAbb

• aaBb

Multiple Choice

What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?

• Ry

• RRyy

• RrYy

• Rryy

Multiple Choice

In a dihybrid cross

• one trait is crossed.

• two traits are crossed.

• four boxes are needed for the punnett square.

• mom's alleles are dominant.

Multiple Choice

How many alleles does a person carry for a trait?

• 1

• 2

• 3

• 4

Multiple Choice

How many alleles does a child get from each parent for a trait?

• 1

• 2

• 3

• 4

Multiple Choice

On a pedigree, this symbol represents a ----

• not affected male.

• not affected female.

• affected male.

• affected female.

Multiple Choice

On a pedigree, this symbol represents a ---

• not affected female.

• not affected male.

• affected male.

• affected female.

Multiple Choice

Which gender has an X and a Y chromosome?

• male

• female

Multiple Choice

What is the mode of inheritance shown here?

• Recessive because it "skips" a generation

• Dominant because it shows up in every generation

Multiple Choice

The trait this pedigree traces is recessive because it skips a generation and individuals can be carriers. What is the most likely genotype for person III-3?

• GG

• Gg

• gg