Flintstones Sex Linked - Kenwood Academy Freshmen Biology

now be revealed!
Name: _____________________________________________ Date: ___________________ Period: ________
Sex-linked Traits with The Flintstones
Directions: Analyze Figure 1 to identify the genotypes and phenotypes for F
Dominant
Geneticists have succeeded in sequencing the genes on the sex chromosomes of Bedrock’s most famous
Allele
Phenotype
Name:
_____________________________________________
couple, Fred
and Wilma Flintstone. Shocking discoveries have been made - the secrets ofDate:
Bedrock___________________
can
O
predisposed to obesity
now be revealed.
Sex-linked Traits with The Flintstones
Directions: Analyze Figure 1 to complete Figure 2.
Phenotype
o
not predisposed to obesity
red-green colorblind
Period: ________
N
normal vision
n
B
normal hair growth
b
baldness
H
normal blood clotting
h
abnormal blood clotting (hemophilia)
D
normal
Geneticists have succeeded in sequencing the genes on the sex chromosomes
ofhearing
P
pigmented eyes
Bedrock’s most famous couple, Fred and Wilma Flintstone. ShockingE discoveries
faulty tooth enamel
have been made - the secrets of Bedrock can now be revealed!
S
sweat glands present
M
not predisposed to migraines
Directions: Analyze Figure 1 to identify the genotypes and phenotypes for Fred and
Wilma Flintstone. Records results in Figure 2.
Dominant
Recessive
Allele
Recessive
d
deafness
p
non-pigmented eyes (red)
e
normal tooth enamel
s
sweat glands absent
m
predisposed to migraines
Fred
Wilma
Allele
Phenotype
Allele
Phenotype
Genotype
Phenotype
O
predisposed to obesity
o
not predisposed to obesity
X OY
obesity
N
normal vision
n
red-green colorblind
B
normal hair growth
b
baldness
XBY
H
normal blood clotting
h
abnormal blood clotting (hemophilia)
X HY
D
normal hearing
d
deafness
X DY
P
pigmented eyes
p
non-pigmented eyes (red)
E
faulty tooth enamel
e
normal tooth enamel
XEY
XeXe
S
sweat glands present
s
sweat glands absent
X sY
X SX s
M
not predisposed to migraines
m
predisposed to migraines
color blind
Phenotype
no obesity
X NX n
bald
X HX h
deaf
red eyes
Figure 1
Genotype
migraines
X PX p
X MX M
Figure 2
1. Identify all of the traits in which Wilma has a heterozygous genotype.
2. Is Fred lying when he tells Wilma that he thinks her hair is a gorgeous shade of red? Use the words
genotype and allele in your answer.
3. Does Wilma get angry when Fred screams, “WILMAAAAA....”? Use the words genotype and allele
in your answer.
4. Fred and Wilma’s daughter, Pebbles, has a headache. Wilma blames Fred because he has a family
history of migraines. Does Pebbles have a migraine, or just a normal headache? Use a Punnett square
to provide evidence.
5. If Fred and Wilma had a son, what is the probability of having normal vision? Use a Punnett square to
provide evidence.
Freshmen Biology- Honors
Name: _____________________________________________ Date: ___________________ Period: ________
6. Fred and Wilma’s neighbors, Barney and Betty Rubble, have a colorblind son,
BamBam. Barney and Betty are confused because they both have no problem
seeing color.
a. What is the genotype of BamBam?
b. Explain which parent is to blame for Bam Bam being colorblind. Use the
terms genotype and allele in your answer.
d. Fred and Wilma are worried because BamBam is Pebbles’s boyfriend. Pebbles can see color. If
Pebbles and BamBam have a baby what is the probability of the baby being colorblind? Use a
Punnett square to provide evidence.
7. Fred and Wilma’s daughter, Pebbles, marries her first love, BamBam. BamBam is
the son of Barney and Betty. Pebbles is worried that their daughter, Lexi, is going
to bald like Wilma. Wilma tells Pebbles she has nothing to worry about because
BamBam and his parents have normal hair.
a. Make a pedigree of this family, identify each member, and label their
genotypes.
b. Is Lexi bald? Explain your answer using the terms genotype and allele.
c. Explain how it would be possible for Lexi to have a bald daughter? Use a Punnett square to
provide evidence.
Freshmen Biology- Honors