WorksheetsGenetics Lesson 3.1-3.2
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
genotypes made of the same alleles
a)
alleles
b)
heterozygous
c)
homozygous
d)
recessive
2.
genotypes made of two different alleles
a)
heterozygous
b)
homozygous
c)
dominant
d)
alleles
3.
gene that is always expressed
a)
heterozygous
b)
homozygous
c)
dominant
d)
recessive
4.
different forms of genes for a single trait
a)
heterozygous
b)
homozygous
c)
recessive
d)
alleles
5.
gene that is expressed only in the homozygous state
a)
recessive
b)
dominant
c)
alleles
d)
homozygous
6.
Choose the dominant allele.
a)
d
b)
E
c)
q
d)
n
7.
Choose the recessive allele.
a)
M
b)
D
c)
r
d)
P
8.
Choose the homozygous dominant.
a)
AA
b)
GR
c)
bB
d)
mm
9.
Choose the homozygous recessive.
a)
ee
b)
Ff
c)
HH
d)
oa
10.
Choose the purebred.
a)
po
b)
bb
c)
cC
d)
Rr
11.
Choose the hybrid
a)
ZZ
b)
kk
c)
Jk
d)
Ff
12.
Which Punnet squares are correct?
a)
a) and b)
b)
b) and c)
c)
c) and d)
d)
a) and d)
13.
What do the letters on the outside of the Punnett square stand for?
a)
possible offspring genotypes
b)
parent alleles
c)
dihybrid traits
d)
parent phenotypes
14.
What do the letters on the inside of the Punnett square stand for?
a)
possible offspring genotypes
b)
parent alleles
c)
dihybrid traits
d)
parent phenotypes
15.
In corn plants, normal height, N, is dominant to short height, n. If the Punnett square showing the cross NN x nn was complete what would it indicate for possible offspring?
a)
all normal height
b)
1/2 normal and 1/2 short
c)
all short height
d)
I don't know how to do a Punnett square.
16.
In corn plants, normal height, N, is dominant to short height, n. If the Punnett square showing the cross Nn x Nn was complete what would it indicate for possible offspring?
a)
1/2 normal and 1/2 short
b)
3/4 normal and 1/4 short
c)
all normal height
d)
I don't know how to do a Punnett square.
17.
In corn plants, normal height, N, is dominant to short height, n. If the Punnett square showing the cross Nn x nn was complete what would it indicate for possible offspring?
a)
1/2 normal and 1/2 short
b)
3/4 normal and 1/4 short
c)
all short height
d)
I don't know how to do a Punnett square.
18.
In guinea pigs, short hair, S, is dominant to long hair, s. Which allele combination would have a phenotype with long hair?
a)
SS
b)
Ss
c)
ss
d)
s
19.
In guinea pigs, short hair, S, is dominant to long hair, s. If you cross a "Ss" pig with a "ss" pig (Ss x ss) what is the probability of having offspring with long hair?
a)
100% = 4/4
b)
50% = 2/4
c)
25% = 1/4
d)
0% = 0/4
20.
In tomatoes, red fruit (R) is dominant over yellow fruit (r). A plant that is homozygous recessive would have what genotype and phenotype?
a)
RR = yellow
b)
rr = red
c)
rr = yellow
d)
Rr = red
21.
In guinea pigs, short hair, S, is dominant to long hair, s. If you cross two pigs that are both heterozygous (with short hair) what are the odds that you will have a short haired offspring?
a)
100%
b)
75%
c)
50%
d)
25%
22.
Hornless (H) in cattle is dominant over horned (h). A homozygous hornless bull is mated with a homozygous horned cow. What will be the genotype and phenotype of the first generation?
a)
HH = hornless
b)
Hh = hornless
c)
Hh = horned
d)
H = hornless
23.
In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller would have what genotype?
a)
roller
b)
non-roller
c)
Rr
d)
rr
24.
In humans, being a tongue roller (R) is dominant over non-roller (r). A woman who is heterozygous for tongue rolling has what genotype?
a)
roller
b)
non-roller
c)
Rr
d)
RR
25.
If the man and women from the previous question have children (rr x Rr), what is the probability of the child being a tongue roller? R) is dominant over non-roller (r).
a)
100%
b)
75%
c)
50%
d)
0%
26.
Brown eyes in humans are dominant to blue eyes. A brown-eyed man, whose mother was blue-eyed, marries a brown-eyed woman whose father had blue eyes.
What is the probability that this couple will have a blue-eyed child?
What is the probability that this couple will have a blue-eyed child?
a)
100%
b)
50%
c)
25%
d)
0%
100 %
