T. Trimpe 2008 http://sciencespot.net/
1. One of SpongeBob’s cousins with hybrid round eyes (Rr) had children with
someone who also had hybrid round eyes (Rr).
A. Create a Punnett square to show the possible offspring that would result
from this cross.
B. Give the genotypes and phenotypes of the offspring.
C. What percentage of the children should have round eyes?
2. Another of SpongeBob’s cousins with hybrid round eyes (Rr) had children
with someone who has oval eyes (rr).
A. Create a Punnett square to show the possible offspring that would result
from this cross.
B. Give the genotypes and phenotypes of the offspring.
C. What percentage of the children should have round eyes?
1. One of SpongeBob’s cousins with hybrid round eyes (Rr) had children with
someone who also had hybrid round eyes (Rr).
A. Create a Punnett square to show the possible offspring that would result from
this cross.
R
r
R RR Rr
r
Rr
rr
B. Give the genotypes and phenotypes of the offspring.
RR = Round eyes
Rr = Round eyes
rr = Oval eyes
C. What percentage of the children should have round eyes?
75%
2. One of SpongeBob’s cousins with hybrid round eyes (Rr) had children with
someone who has oval eyes (rr).
A. Create a Punnett square to show the possible offspring that would result from
this cross.
r
r
R Rr
Rr
rr
rr
r
B. Give the genotypes and phenotypes of the offspring.
C. What percentage of the children should have round eyes?
Rr = Round eyes
rr = Oval eyes
50%