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Mendelian Inheritance Review

Total questions: 61

Worksheet time: 3hrs 37mins

Name
Class
Date
1.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
2.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
3.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
4.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
5.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
6.
B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
7.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
8.
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%
9.
What genotype would go in box 2?
a)
BB
b)
Bb
c)
bb
10.

In pea plants, round seeds (R) are dominant to wrinkled seeds (r). Which of the following represents the genotype of a pea plant that is homozygous dominant?

a)

RR

b)

round

c)

Rr

d)

wrinkled

e)

rr

11.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
12.

What are the possible phenotype(s) of the offspring?

(Brown hair (A) is dominant to blonde hair (a).)

a)

50% Brown Hair and 50% Blonde Hair

b)

25% Brown Hair and 75% Blonde Hair

c)

75% Brown Hair and 25% Blonde Hair

d)

0% Brown Hair and 100% Blonde Hair

13.

What are the possible alleles a parent with the GgBb genotype could donate to their gametes? (Hint: F.O.I.L.)

a)

GB, Gb, gB, gb

b)

GB, GB, gb, gb

c)

Gb, Gb, Gb, GB

d)

GG, BB, gg, bb

14.

What genotype is missing from this Punnett Square?

a)

RrYy

b)

RRYY

c)

rryy

d)

RrYY

15.

Round (R) and yellow (Y) are dominant traits. Based off this Punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

a)

9/16

b)

3/16

c)

1/16

d)

16/16

16.

Black fur in mice (B) is dominant to brown fur (b).

Short tails (T) are dominant to long tails (t).

What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?

a)

0%

b)

25%

c)

50%

d)

100%

17.

What fraction of offspring from the cross AaBB x Aabb will be heterozygous for both traits? (Write out the Punnett square.)

a)

1/16

b)

1/4

c)

1/2

d)

3/16

18.

Brown eyes (B) are dominant to green (b). What percent of offspring would be green?

a)

25%

b)

50%

c)

75%

d)

100%

19.
What is the phenotypic ratio of a dihybrid cross of 2 heterozygous parents?
a)

3:4:3:6

b)

1:2:3:4

c)

9:3:3:1

d)

8:4:3:1

20.

Cross RRYY x rryy. R=round seeds, r=wrinkled seeds; Y=yellow seeds, y=green seeds. What percent will have Round/Yellow seeds? 

a)

0%

b)

25%

c)

50%

d)

100%

21.

Genotype or phenotype: freckles

a)

genotype

b)

phenotype

22.

Genotype or phenotype: Rr

a)

genotype

b)

phenotype

23.

genotype or phenotype: nn

a)

genotype

b)

phenotype

24.

genotype or phenotype: curly hair

a)

genotype

b)

phenotype

25.

Which is homozygous dominant?

a)

Rr

b)

tt

c)

PP

d)

Ww

26.

Which is heterozygous?

a)

WW

b)

Yy

c)

qq

d)

TT

27.

Which is hybrid?

a)

mm

b)

NN

c)

Cc

d)

GG

28.

Which is homozygous recessive?

a)

ee

b)

Hh

c)

PP

d)

Vv

29.

What percent of the offspring are hybrids?

a)

25%

b)

50%

c)

75%

d)

100%

30.

Green (G) is dominant over yellow (g). What percent of the offspring will be Green?

a)

0%

b)

25%

c)

50%

d)

100%

31.

When two hybrids are crossed, what percent of the offspring will show the weaker recessive trait?

a)

25%

b)

50%

c)

75%

d)

100%

32.

In guinea pigs, curly tails (C) are dominant over straight (c). Cross a hybrid curly tailed pig with a straight pig. What percent of the offspring will have strait tails?

a)

0%

b)

25%

c)

50%

d)

100%

33.
What do we call the table used to calculate the probability of an offspring's genotype?
a)
Punnett square
b)
Venn diagram
c)
Golden ratio
d)
Fibonacci sequence
34.

This type of allele is more likely to be prominent in offspring

a)

Dominant phenotype

b)

Dominant allele

c)

Recessive allele

d)

Recessive genotype

35.

This type of allele is less likely to be prominent (to show up) in offspring

a)

Dominant genotype

b)

Recessive allele

c)

Dominant allele

d)

Recessive phenotype

36.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
37.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
38.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
39.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
40.
 Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
41.
 Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
42.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
43.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
44.

Which represents the genotype of a homozygous condition? (Choose 2)

a)

BB

b)

Bb

c)

bb

45.

Which of the following terms refers to the different forms of a trait?

a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
46.
What percentage of the offspring will be heterozygous dominant?
a)
100%
b)
75%
c)
50%
d)
25%
47.
What percentage of the possible offspring will be hybrids?
a)
25%
b)
50%
c)
75%
d)
100%
48.
If two purebred species (BB) are crossed, what percentage of their offspring would be BB?
a)
25%
b)
50%
c)
75%
d)
100%
49.
Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?
a)
RR
b)
Rr
c)
rr
50.
What is the percentage of a homozyogus dominant offspring?
a)
75%
b)
50%
c)
25%
d)
0%
51.
D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?
a)
DD
b)
Dd
c)
dd
52.
True or False:
A heterozygous dominant trait can be written as BB.
a)
True
b)
False
53.
What percentage of the offspring will be purebred dominant?
a)
0%
b)
25%
c)
50%
d)
75%
54.
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
55.
Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?
a)
Gg
b)
gg
c)
GG
56.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
57.
The gene makeup of an organism for a particular trait is known as its
a)
dominance
b)
phenotype
c)
allele
d)
genotype
58.
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%
59.

Each parent contributes one of the genes for a particular trait. Each of those genes are written as a single letter and are called:

a)
variables
b)
gametes
c)
hybrids
d)
alleles
60.
The observable traits of an organism are known as its
a)
allele
b)
dominance
c)
phenotype
d)
genotype
61.
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%

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