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Genetics

Total questions: 70

Worksheet time: 1hrs 18mins

Name
Class
Date
1.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
2.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
3.
What law states that in Tt the person will only show the dominant allele
a)
law of segregation
b)
law of independent assortment
c)
law of dominance
d)
law of punnett squares
4.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
5.

Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?

a)

Purebred

b)

Hybrid

c)

Homozygous

d)

Sex-linked

6.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
7.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
8.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
9.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
10.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
11.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
12.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
13.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
14.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
15.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
16.
Snapdragon flowers come in red, pink and white.  What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
17.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
18.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
19.
Red/green color blindness is a recessive trait.  A woman who is a carrier for this allele marries a normal-vision male.  What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
20.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
21.
The study of heredity and the variation of inherited characteristics 
a)
gene
b)
genetics 
c)
meiosis 
d)
hybrid 
22.

What type of inheritance do two alleles have if their traits blend together?

a)

Incomplete Dominance

b)

Co-Dominance

c)

Mendelian Inheritance (Complete Dominance)

d)

Homozygous Inheritance

23.
A pattern of inheritance in which a trait is carried on one of the sex-determining chromosomes.
a)
Mendelian Inheritance
b)
Co-dominance
c)
Incomplete dominance
d)
Sex-linked inheritance
24.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
25.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
26.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
27.
Hemophilia is a x-linked disorder.  A woman is a carrier for the disorder.  Which is the correct genotype?
a)
Hh
b)
XHXh
c)
hh
d)
XhXh
28.
If a colorblind male marries a woman who is a carrier, what percentage of their FEMALE children will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
29.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
30.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
31.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
32.
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
33.
B - black, b - brown.  Two black mice mate and have some black and some brown mice.  What is the genotype of the parents?
a)
BB x Bb
b)
BB x bb
c)
Bb x Bb
d)
Bb x bb
34.
One reason for Mendel's success with genetic studies of peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the sources of variation in peas
35.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%
36.
A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?
a)
TT and tt
b)
TT and Tt
c)
Tt and Tt
d)
TT and TT
37.
In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?
a)
25%
b)
50%
c)
75%
d)
100%
38.
A person with type O blood marries a person with type AB blood. Possible blood genotypes of their children are
a)
I(A)i and I(B)I(B)
b)
I(B)I(B) and I(A)I(A)
c)
I(A)i and I(B)i
d)
I(A)I(B) and ii
39.

Which is an example of codominance?

a)

Pink flowers

b)

Cystic fibrosis

c)

Roan cows

d)

Round and wrinkled peas

40.

What percent of your genes are given to you by your mother?

a)

None

b)

25%

c)

50%

d)

All of them

41.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
42.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
43.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
44.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
45.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
46.
Why does individual IV-5 have colorblindness?
a)
Because his mom is a carrier.
b)
Because his dad has it.
c)
Because his siblings have it.
d)
Because his uncle has it.
47.
If a trait shows up more commonly in men than women it is probably
a)
not inherited
b)
on the x chromosome and dominant
c)
on the x chromosome and recessive
d)
on a normal body chromosome
48.

Traits that do not behave as solely dominant or recessive are called:

a)

Non-Mendelian Traits

b)

X-Linked Traits

c)

Homozygous

d)

Mutations

49.

When the heterozygous condition produces a blend of the two possible traits, this is called:

a)

Incomplete dominance

b)

Codominance

c)

X-Linked

d)

Hybridizing

50.

When the heterozygous condition results in both the traits being displayed together, this is called:

a)

Incomplete dominance

b)

Codominance

c)

X-Linked

d)

Hybridizing

51.

This image displays which type of non-Mendelian trait?

a)

Incomplete dominance

b)

Codominance

52.

This image displays which type of non-Mendelian trait?

a)

Incomplete dominance

b)

Codominance

53.

This image displays which type of non-Mendelian trait?

a)

Incomplete dominance

b)

Codominance

54.

This image displays which type of non-Mendelian trait?

a)

Incomplete dominance

b)

Codominance

55.

The human AB blood type is an example of which non-Mendelian trait?

a)

Incomplete dominance

b)

Codominance

56.

Traits for which there are more than 2 possible alleles, such as human blood type, are examples of:

a)

Polygenic

b)

Multiple alleles

c)

Codominant

d)

Incomplete dominance

57.
Offspring receives two sets of _____________ (one from each parent)
a)
blue jeans
b)
genes
c)
machines
d)
pedigree
58.
One trait that is ALWAYS present and causes the other traits to disappear is a ________________________
a)
recessive trait
b)
aggressive trait
c)
absent trait
d)
dominant trait
59.

The image is showing two possible ways non-homologous chromosomes may line up during metaphase 1 of meiosis 1. Which of Mendel's laws is this image depicting?

a)

Mendel's Law of dominance

b)

Mendel's Law of recessive

c)

Mendel's Law of random assortment

d)

Mendel's Law of Independent Assortment

60.

Which of Mendel's laws states that alleles are distributed to gametes independent of one another?

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

61.

If a dominant allele is present, the trait will always appear in the organism.

a)

Law of Segregation

b)

Law of Dominance

c)

Law of Independent Assortment

62.

A species of mice can have gray or black fur and long or short tails. A cross between black-furred, long-tailed mice and gray-furred, short-tailed mice produce all black-furred, long-tailed offspring. Using the gene symbols G for black, g for gray, S for long and s for short, what would be the genotype of a gray-furred, short-tailed mouse?

a)

GGSS

b)

ggSS

c)

ggss

d)

GgSs

e)

Ggss

63.

If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

64.

An organism is a hybrid genotype (Tt) but is appears tall instead of short.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

65.

Person A is smart and has brown hair while Person B is also smart but has blonde hair.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

66.

There are more right-handed people in the world.

a)

Law of Dominance

b)

Law of Segregation

c)

law of Independent Assortment

67.

One gene for the type of earlobes a person will have will be in each gamete.

a)

Law of Dominance

b)

Law of Independent Assortment

c)

Law of Segregation

68.
The Law of Segregation states that alleles separate during the process of ...
a)
Mitosis
b)
Meiosis
c)
Fertilization
d)
Replication
69.

A man with blood type AB is married to a woman with blood type O. They have 2 natural children and 1 adopted child. The children's blood types are: A,B, & O. Which child was adopted?

a)

Child with A blood type

b)

Child with B blood type

c)

Child with O blood type

d)

There is no way to know

70.

What gametes can be produced by a pea plant that is YyTt?

a)

Yy, Tt

b)

YY, YT, yT, Tt

c)

YT, yT

d)

YT, Yt, yT, yt

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