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93- Genetics Review

Total questions: 40

Worksheet time: 3600secs

Name
Class
Date
1.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
2.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
3.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
4.
Which of the following best describes a GENOTYPE?
a)
The allele/genetic makeup of an organism.
b)
The physical expression of a trait.
5.
Which of the following is an example of a heterozygous genotype?
a)
RR
b)
Rr
c)
rr
6.

What is the predicted percentage of homozygous recessive offspring in this cross?

a)

0%

b)

25%

c)

50%

d)

75%

7.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
8.
The dominant trait in this punnett square is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
9.
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%
10.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
11.
If two purebred species (BB) are crossed, what percentage of their offspring would be BB?
a)
25%
b)
50%
c)
75%
d)
100%
12.
What do you call the physical expression of a gene?
a)
genotype
b)
dominant
c)
phenotype
d)
allele
13.
What percentage of the possible offspring will be hybrids?
a)
25%
b)
50%
c)
75%
d)
100%
14.

Having two of the same alleles for a trait (sometimes called purebred).

a)

homozygous

b)

hetrozygous

c)

protein

d)

chromosome

15.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
16.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
17.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

18.
Green is dominant to yellow. Two heterozygous green plants are crossed. What are the genotypes of the offspring?
a)
100% Gg
b)
50% GG, 50% Gg
c)
25% GG, 50% Gg, 25% gg
d)
75% Gg, 25% gg
19.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
20.

In guinea pigs, the allele for rough coat (R) is dominant over the allele for smooth coat (r).  A homozygous dominant guinea pig and a homozygous recessive guinea pig are mated.

What would be the phenotype of the offspring?

a)

100% rough coat

b)

100% smooth coat

21.

A tool used to predict the probability of offspring inheriting certain traits is called a ...

a)

karyotype

b)

Punnett Square

22.

In humans, freckles (F) on the skin are dominant to no freckles (f).  If a heterozygous parent and a recessive parent conceive, what is the chances of having a child with NO FRECKLES?

a)

0%

b)

50%

c)

100%

23.

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

a)

Homozygous dominant

b)

Heterozygous

c)

Homozygous recessive

24.

In chickens, black is co dominant with white feathers. Which cross would result in 50% black and white feathers?

a)

BW x BW

b)

BB x WW

c)

BW x WW

d)

WW x BB

25.
In flowers, 2 pink (RW) flowers are crossed. What are the genotypes and phenotypes of their offspring?
a)
100% pink (RW)
b)
50% pink (RW); 25% white (WW); 25% red (RR)
c)
75% pink (RW); 25% white (WW)
d)
100% red (RR)
26.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
27.

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

a)

HH

b)

Hh

c)

hh

28.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
29.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
30.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
31.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
32.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
33.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
34.

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring represented in this P square will be calico (black and tan spotted)?

a)

25%

b)

50%

c)

75%

d)

100%

35.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?

a)

25

b)

50

c)

75

d)

100

36.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be white?

a)

25

b)

50

c)

0

d)

100

37.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be gray?

a)

25

b)

50

c)

75

d)

100

38.
 Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
39.
 Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
40.
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

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