NEW
Font size
S
M
L
XL
WorksheetsFall Final Exam Genetics
Total questions: 21
Worksheet time: 20mins
Name
Class
Date
1.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
2.
If T=Tall & t=short, what would be the potential the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
3.
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%
4.
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
5.
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%
6.
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
7.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
8.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
9.
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
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
10.
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
75% purple, 25% white
11.
A cross of a red cow with a white bull produces all roan offspring. This type of inheritance is known as
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
"breed time:
12.
If an organism with a homozygous dominant trait was mated in a test cross, all the F1 offspring would be
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
50% homozygous;50% heterozygous
13.
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%
14.
Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r = wrinkled seeds
Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
(RRYY x rryy)
R = round seeds, r = wrinkled seeds
Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
a)
0%
b)
25%
c)
50%
d)
100%
15.
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
a)
12.5%
b)
25%
c)
50%
d)
75%
16.
A vampire bat mom is homozygous dominant for red eyes (RR) and heterozygous for fluffy ears (Ff).
The vampire bat father is homozygous recessive for black eyes (rr) and has fluffy ears.
If some of the vampire bat babies have smooth ears, what percentage of babies will have the same eyes and ears as their mom?
The vampire bat father is homozygous recessive for black eyes (rr) and has fluffy ears.
If some of the vampire bat babies have smooth ears, what percentage of babies will have the same eyes and ears as their mom?
a)
25%
b)
50%
c)
75%
d)
100%
17.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
18.
What is the cause of some traits "skipping" a generation?
a)
dominant traits
b)
recessive traits
c)
hybrid alleles
d)
homologous chromosomes
19.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
20.
Which of the following identifies the phenotypes?
a)
A
b)
B
c)
C
d)
D
21.
Which of the following identifies the gametes?
a)
A
b)
B
c)
C
d)
D
Reset
