Bikini Bottom
Genetics
Grab a pencil and some paper for today’s class.
We will begin here in a bit!
Scientists at Bikini Bottom have been
investigating the genetic makeup of the
organisms in this community. Use the
information provided and your
knowledge of genetics to answer each
question.
For the following genotypes found in
the critters of Bikini Bottom, indicate
if they are homozygous or
heterozygous.
TT
A. Homozygous
B. Heterozygous
For the following genotypes found in
the critters of Bikini Bottom, indicate
if they are homozygous or
heterozygous.
Dd
A. Homozygous
B. Heterozygous
For the following genotypes found in
the critters of Bikini Bottom, indicate
if they are homozygous or
heterozygous.
Yy
A. Homozygous
B. Heterozygous
For the following genotypes found in
the critters of Bikini Bottom, indicate
if they are homozygous or
heterozygous.
tt
A. Homozygous
B. Heterozygous
Sometimes when referring to
animals…
Homozygous = Purebred
Heterozygous = Hybrid
For SpongeBob, yellow body
color is dominant to blue
1. YY
2. Yy
3. yy
A. Yellow
B. Blue
A. Yellow
B. Blue
A. Yellow
B. Blue
For SpongeBob, square shape
is dominant to round.
1. SS
2. Ss
3. ss
A. Square
B. Round
A. Square
B. Round
A. Square
B. Round
For Patrick Star, a tall head
is dominant to a short head.
1. Tall
2. Short
What are the
possible
genotypes?
What are the
possible
genotypes?
For Patrick Star, pink color
is dominant to yellow.
1. Pink
2. Yellow
What are the
possible
genotypes?
What are the
possible
genotypes?
SpongeBob SquarePants recently met
SpongeSusie RoundPants at a dance.
SpongeBob is
heterozygous
square.
SpongeSusie is
round.
Remember, square is dominant to round.
SpongeBob is
heterozygous
square.
SpongeSusie is
round.
Patrick Star met Patti at the dance.
Patrick is
heterozygous
pink.
Patti is
heterozygous
pink.
Remember, pink is dominant to yellow.
Patrick is
heterozygous
pink.
Patti is
heterozygous
pink.
Everyone in Squidward’s family is bald, the
dominant trait. They brag they are a pure bred
line. He marries Squidette who has hair.
Squidward is
purebred bald.
Squidette has
hair.
Remember, bald is dominant to having hair.
Squidward is
purebred bald.
Squidette has
hair.
Mr. and Mrs. Krabs recently had a Lil’ Krabby.
Mrs. Krabs is upset because the baby has short
eyeballs. She claims the hospital mixed her baby
up with someone else’s.
Mr. Krabs is
homozygous tall
eyes.
Lil’ Krabby has
short eyes?
Mrs. Krabs is
heterozygous
for tall eyes.
Did the hospital make a mistake?
Mr. Krabs is
homozygous tall
eyes.
Lil’ Krabby has
short eyes?
Mrs. Krabs is
heterozygous for
tall eyes.
Let’s not forget the biggest
mystery in genetics…
+
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