Quiz about Heredity Unit Test Review

Question 1

Two heterozygous purple-flowering pea plants are crossed. If purple is dominant over white, what are the expected phenotypic results?

Accepted Answer

75% purple, 25% white

Answer

25% purple, 75% white.

Answer

100% purple

Answer

50% purple, 50% white

Question 2

If an organism inherits one dominant allele and one recessive allele for eye color, their genotype would be:

Accepted Answer

heterozygous

Answer

homozygous

Answer

homologous

Answer

haploid

Question 3

Two parents have the genotype Gg for a genetic disorder caused by a recessive allele. What is the chance that any of their children will inherit the disorder?

Accepted Answer

25%

Answer

50%

Answer

75%

Answer

100%

Question 4

Which Mendelian law of inheritance states that organisms inherit two copies of each gene and donate one copy to each of their offspring?

Accepted Answer

Law of Segregation

Answer

Chromosome Theory of Inheritance

Answer

Law of independent assortment

Answer

Law of dominance

Question 5

In pigs, the allele for a wavy, rough coat (R) is dominant to the allele for a soft, fine coat (r). A rough coat boar and a soft coat sow mate. They produce several litters, 50% are rough coat and 50% are smooth coat. What must be the genotypes of the

parents to create this phenotypic ratio?

Accepted Answer

Rr x rr

Answer

Rr x Rr

Answer

RR x Rr

Answer

RR x rr

Question 6

Imagine two heterozygous parents. Each has a dominant allele (B) for brown eyes and a recessive allele (b) for blue eyes. What would the genotypic ratio of the offspring be?

Accepted Answer

25% BB, 50% Bb, 25% bb

Answer

50% BB, 50% Bb

Answer

50% Bb, 50% bb

Answer

100% Bb

Question 7

Identify the following genotypes as homozygous or heterozygous.

TT: _____

Tt: _____

tt: _____

Accepted Answer

TT: homozygous

Tt: heterozygous

tt: homozygous

Answer

TT: homozygous

Tt: homozygous

tt: heterozygous

Answer

TT: homozygous

Tt: heterozygous

tt: heterozygous

Answer

TT: heterozygous

Tt: heterozygous

tt: homozygous

Question 8

If square is dominant over round, what are the phenotypes for the following genotypes?

SS: ______

Ss: ______

ss: ______

Accepted Answer

SS: square

Ss: square

ss: round

Answer

SS: round

Ss: round

ss: square

Answer

SS: round

Ss: square

ss: round

Answer

SS: square

Ss: round

ss: square

Question 9

The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype.

Which punnett square below shows the correct genotype cross with the correct possible offspring?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 10

The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype.

Which punnett square below shows the correct genotype cross with the correct possible offspring?

What is the phenotypic ratio of the offspring?

Accepted Answer

50% curly, 50% not curly

Answer

100% not curly

Answer

100% curly

Answer

75% curly, 25% not curly

Question 11

The American Curl is a breed of cat that has curly ears. The allele for the curly ears is dominant (E). Suppose a cat with the heterozygous genotype is bred to a female cat with the homozygous recessive genotype.

Which punnett square below shows the correct genotype cross with the correct possible offspring?

If the cross produces six kittens, how many of them will have curly ears?

Accepted Answer

3

Answer

4

Answer

2

Answer

6

Question 12

For an XX female to express a recessive sex-linked trait, she must have ________________.

Accepted Answer

two recessive alleles

Answer

one recessive allele

Answer

two dominant alleles

Answer

a Y chromosome

Question 13

Human height occurs in a continuous range because it is affected by the interaction of many genes, making it a(n)...

Accepted Answer

polygenic trait

Answer

sex-linked trait

Answer

codominant trait

Answer

autosomal trait

Question 14

Red hair and freckles are commonly inherited together. Which of following patterns of inheritance explains this?

Accepted Answer

linked genes

Answer

multiple alleles

Answer

sex-linked

Answer

Codominance

Question 15

Which pair of genes in the diagram would be most likely to be inherited together?

Accepted Answer

A & B

Answer

A & C

Answer

C & D

Answer

D & E

Question 16

In a newly discovered species of flower, it was discovered that the color of the flowers is determined by two different genes. Which of the following inheritance patterns is this?

Accepted Answer

polygenic inheritance

Answer

Incomplete dominance

Answer

Linked genes

Answer

multiple alleles

Question 17

A man with Type A blood marries a woman with Type AB blood. Based on what you know about blood types, what is the only blood type NOT possible in any of their children?

Accepted Answer

O

Answer

B

Answer

A

Answer

AB

Question 18

A cross between a purebred animal with red hairs and a purebred animal with white hairs produces all animals with BOTH red and white hairs is what type of inheritance pattern?

Accepted Answer

Codominance

Answer

incomplete dominance

Answer

polygenic trait

Answer

sex-linked trait

Question 19

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait is an example of what type of inheritance pattern?

Accepted Answer

sex-linked

Answer

polygenic trait

Answer

Codominance

Answer

incomplete dominance

Question 20

A cross between a white horse and a chestnut (dark brown) horse produces all light brown horses is an example of what type of inheritance pattern?

Accepted Answer

incomplete dominance

Answer

sex-linked trait

Answer

Codominance

Answer

polygenic trait

Question 21

A cross between a tall sunflower and a short sunflower results in sunflowers with a range in heights is an example of what type of inheritance pattern?

Accepted Answer

polygenic trait

Answer

incomplete dominance

Answer

sex-linked trait

Answer

Codominance

Question 22

A man who is normal for color vision marries a woman who is colorblind (Remember, color-blindness is a sex-linked trait!) What is the probability of a having a colorblind male?

Accepted Answer

50%

Answer

25%

Answer

75%

Answer

100%

Question 23

Mutations can be caused by all of the following EXCEPT ___________________.

Accepted Answer

global warming

Answer

chemicals

Answer

mistakes

Answer

viruses

Question 24

In order for a mutation to be passed on from parent to offspring, the mutation must occur in_____.

Accepted Answer

gametes (sex cells)

Answer

somatic cells

Answer

brain cells

Answer

any cell of the body

Question 25

On a pedigree, how would a female individual with a disease be notated?

Accepted Answer

as a shaded circle

Answer

as a shaded square

Answer

as an unshaded circle

Answer

as an unshaded square

Question 26

If a mutation only changes the nucleotide sequence for a single protein, then it is known as a _______

Accepted Answer

gene mutation

Answer

translocation

Answer

chromosomal mutation

Answer

nondisjunction mutation

Question 27

What kind of mutation occurred in the sex chromosome of an individual with the genotype XXY?

Accepted Answer

nondisjunction

Answer

translocation

Answer

nucleotide insertion

Answer

nucleotide deletion

Question 28

How would you categorize a genetic disorder that is equally likely in males and females and is caused by the presence of two affected alleles?

Accepted Answer

Autosomal recessive disorder

Answer

sex chromosome disorder

Answer

sex-linked disorder

Answer

Autosomal dominant disorder

Question 29

Nondisjunction of autosomal chromosomes, such as chromosome number 21, can result in disorders like...

Accepted Answer

Down Syndrome

Answer

Klinefelter's Syndrome

Answer

Turner's Syndrome

Answer

Sickle Cell Anemia

Question 30

Which BEST explains the difference between a gene mutation and a chromosome mutation?

Accepted Answer

gene mutation is one gene messed up but a chromosome mutation is multiple genes messed up

Answer

gene mutation and chromosome mutation are both one gene messed up

Answer

gene mutation is multiple genes messed up but chromosome mutation is one gene messed up

Answer

gene mutation and chromosome mutation are both multiple genes messed up

Question 31

Which of the following is an example of a GENE MUTATION?

Accepted Answer

Cystic Fibrosis

Answer

Down Syndrome

Answer

Edward's Syndrome

Answer

Turner's Syndrome

Question 32

Which of the following is an example of a CHROMOSOME MUTATION?

Accepted Answer

Turner's Syndrome

Answer

dwarfism

Answer

Sickle cell anemia

Answer

cystic fibrosis

Question 33

A DNA segment in a somatic cell undergoes the mutation pictured, what is the name of this type of mutation?

Accepted Answer

point mutation

Answer

translocation

Answer

deletion mutation

Answer

insertion mutation

Question 34

A DNA segment in a somatic cell undergoes the mutation pictured, is this a gene mutation, chromosome mutation, or neither?

Accepted Answer

gene mutation

Answer

chromosome mutation

Answer

neither

Answer

both

Question 35

Consider the pedigree pictured, What type of inheritance is displayed?

Accepted Answer

autosomal recessive

Answer

polygenic

Answer

autosomal dominant

Answer

sex-linked

Question 36

Consider the pedigree pictured, What is the genotype of the first individual in generation II?

Accepted Answer

rr

Answer

RW

Answer

RR

Answer

Rr

Question 37

Consider the pedigree pictured, What is the genotype of the grandmother (the oldest female) in this family?

Accepted Answer

Rr

Answer

RR

Answer

rr

Answer

RW

Question 38

The form of a gene that is always expressed if present is the _____________ form.

Accepted Answer

dominant

Answer

recessive

Answer

homologous

Answer

heterozygous

Heredity Unit Test Review

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