What do you know
about the world of
genetics?
T. Trimpe 2008 http://sciencespot.net/
Use your knowledge of genetics to answer these questions.
1. Indicate whether each genotype is a heterozygous (He) or homozygous (Ho).
TT _____
Pp _____
dd _____
Ff _____
Tt ____
Which ones would be considered purebred? ___________
2. In SpongeBob’s family, a yellow body color (Y) is dominant to blue (y) color.
Determine the phenotype for each genotype below based on this information.
YY ______________
Yy ______________
yy ______________
3. If round eyeballs (R) are dominant to oval eyeballs (r), give the genotypes that
are possible for members of SpongeBob’s family.
Round eyeballs = ______________ Oval eyeballs = _________________
The answers are …
1. Indicate whether each genotype is a heterozygous (He) or homozygous (Ho).
He
He Tt ____
He
Ho
Ho
TT _____
Pp _____
dd _____
Ff _____
TT and dd
Which ones would be considered purebred? ___________
2. In SpongeBob’s family, a yellow body color (Y) is dominant to blue (y) color.
Determine the phenotype for each genotype below based on this information.
Yellow
YY ______________
Blue
Yy ______________
Yellow
yy ______________
3. If round eyeballs (R) are dominant to oval eyeballs (r), give the genotypes that
are possible for members of SpongeBob’s family.
RR or Rr
rr
Round eyeballs = ______________ Oval eyeballs = _________________