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test Review

Total questions: 50

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

Who is known as the "father of genetics"?

a)

Charles Darwin

b)

Karl Ernst von Baer

c)

Gregor Mendel

d)

Francis Franklin

2.

A HETEROZYGOUS individual would have the genotype:

a)

Hh

b)

hh

c)

HH

d)

Hi

3.

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

a)

BB

b)

Bb

c)

bb

d)

None of the above, brown eyes are dominant.

4.

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

a)

25%

b)

50%

c)

75%

d)

100%

5.

Sections of DNA on a chromosome are called:

a)

nuclei.

b)

RNA.

c)

genes.

d)

traits.

6.
In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?
a)
100%
b)
75%
c)
50%
d)
25%
7.
Each parent contributes one of the genes for a particular trait. The genes of the pair are called:
a)
variables
b)
gametes
c)
hybrids
d)
alleles
8.
In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is
a)
 25%
b)
 75%
c)
100%
d)
0%
9.
The color black is dominant in guinea pigs. The phenotypes of homozygous black guinea pigs and heterozygous black guinea pigs are:
a)
black
b)
gray
c)
BB and Bb
d)
white
10.
The gene makeup of an organism for a particular trait is known as its
a)
dominance
b)
phenotype
c)
allele
d)
genotype
11.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
12.
Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?
a)
Gg
b)
gg
c)
GG
13.
In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?
a)
white and purple
b)
white 
c)
purple
d)
lavendar
14.
Dominant alleles are represented by a(n)
a)
phenotype
b)
lower case letter
c)
upper case letter
d)
punnett square 
15.
True or False:
A heterozygous dominant trait can be written as BB.
a)
True
b)
False
16.
D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?
a)
DD
b)
Dd
c)
dd
17.
What is the percentage of a homozyogus dominant offspring?
a)
75%
b)
50%
c)
25%
d)
0%
18.
Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?
a)
RR
b)
Rr
c)
rr
19.
What percentage of the offspring will be heterozygous dominant?
a)
100%
b)
75%
c)
50%
d)
25%
20.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
21.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
22.

In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.

a)

Red = RR, white = rr, speckled = SS

b)

Red = RR, white = WW, speckled = SS

c)

Red = RR, white = RW, Speckled = WW

d)

Red = RR, white = WW, speckled = RW

23.
If this image were real, it would represent what type of inheritance?
a)
incomplete dominance
b)
codominance
c)
polygenic inheritance
d)
compete dominance
24.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
25.

A roan cow shows codominance in fur color (brown and white). What is the phenotype ratio expected in offspring a female roan and a male roan mate together?

a)

All four would be brown and White

b)

Half would be orange, half would be white

c)

2 Brown: 2 Brown and White: 0 White

d)

1 Brown: 2 Brown and White: 1 White

26.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

27.

In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.


What is the genotype for a brown mouse?

a)

BB

b)

Bb

c)

bb

28.

Based on the Punnett Square shown above, what is the percentage of getting a RW offspring?

a)

50%

b)

75%

c)

25%

d)

100%

29.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
30.
Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?
a)
Gg
b)
gg
c)
GG
31.
In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?
a)
white and purple
b)
white 
c)
purple
d)
lavendar
32.
If two purebred species (BB) are crossed, what percentage of their offspring would be BB?
a)
25%
b)
50%
c)
75%
d)
100%
33.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
34.
AB blood type is an example of what type of inheritance?
a)
complete dominance
b)
incomplete dominance
c)
codominance
d)
polygenic inheritance
35.
What do you call the non-Mendelian inheritance pattern that states that neither trait is dominant and the traits appear to blend together?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
36.

If a child shows a recessive disorder, and his brother does not, his healthy parents' genotypes are;

a)

Hh and Hh

b)

HH and HH

c)

Hh and HH

d)

hh and hh

37.

Why do all girls of a male who has the dominant X-linked trait also have the trait?

a)

because they get both X’s from their Dad.

b)

because the dad gives them the Y.

c)

because they get one X from their mom which always has the dominant trait.

d)

because they get one X from their dad which has the dominant trait.

38.

Which term means "a version of a gene"?

a)

Allele

b)

Genotype

c)

Phenotype

d)

Gene

39.

Which term means "the actual alleles an individual inherited"?

a)

Phenotype

b)

Genotype

c)

Gene

d)

Allele

40.

Which term means "allele that is always expressed if present"?

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Heterozygous

41.

Which term means "when homologous chromosomes have the same alleles on them"?

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Heterozygous

42.

Which term means "section of DNA that codes for a protein and/or trait"?

a)

Allele

b)

Gene

c)

Phenotype

d)

Genotype

43.

Which term means "allele that is only expressed in the homozygous state"?

a)

Dominant

b)

Recessive

c)

Heterozygous

d)

Genotype

44.

Which term means "when homologous chromosomes have different alleles on them"?

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Heterozygous

45.

Which term means "the physical trait expressed"?

a)

Allele

b)

Gene

c)

Phenotype

d)

Genotype

46.

Select the homozygous dominant genotypes

a)

AA

b)

Bb

c)

dd

d)

Ee

47.

Select the heterozygous genotypes

a)

AA

b)

Bb

c)

CC

d)

dd

48.

Select the homozygous recessive genotypes

a)

AA

b)

Bb

c)

CC

d)

dd

49.

Select the genotypes that would result in the dominant phenotype being expressed

a)

AA

b)

Bb

c)

CC

d)

dd

e)

Ee

50.

Select the options that would result in the recessive phenotype being expressed.

a)

Bb

b)

CC

c)

dd

d)

Ee

e)

ff

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