Download 61.2 More Punnett Square Practice

Name _____________________________________________ Date __________________ Period ________
61.2 More Punnett Square Practice
Vocabulary Review
Alleles: ________________________________________________________________________________
Dominant: ______________________________________________________________________________
Recessive: ______________________________________________________________________________
Homozygous: ___________________________________________________________________________
Heterozygous: ___________________________________________________________________________
Genotype: ______________________________________________________________________________
Phenotype: _____________________________________________________________________________
1a) Red flowers are dominant over White flowers.
Characteristic: ______________________
Traits: ___________________, ____________________
Dominant Allele: __________________ Recessive Allele: ___________________
b) How would you write the genetic makeup for flower color?
Red Gene _______ White Gene _______
c) A white flower (rr) is crossed with a red flower (Rr).
Parent 1
Parent 2
Genotype: ________
Genotype: ________
Phenotype: _________________
Phenotype: _________________
Offspring Probability
Genotype: _________________________________
Phenotype: ________________________________
2a) Tall plants are dominant over short plants.
Characteristic: ______________________
Traits: ___________________, ____________________
Dominant Allele: __________________ Recessive Allele: ___________________
b) How would you write the genetic makeup for plant height?
Tall Gene ________ Short Gene _________
c) A heterozygous tall plant is crossed with another heterozygous tall plant.
Parent 1
Offspring Probability
Genotype: _________
Genotype:
Phenotype: ________________
______________________
Parent 2
Phenotype:
Genotype: _________
______________________
Phenotype: ________________
______________________
More Punnett Square Practice…
Directions: Read the scenario. A) First determine how you will write the genetic makeup, remember, the
first letter of the characteristic is used most often. Figure out the genotype of each of the parents, then using a
Punnett Square make the cross. B) Determine the predicted genotype and C) phenotype of the offspring.
Write it in the provided space.
4. Short eyelashes are recessive to long eyelashes. A woman with long eyelashes (heterozygous) marries a
man who also has long eyelashes (heterozygous).
Characteristic:
a) Parent 1:
b) Offspring Genotype:
Traits:
Dominant Allele:
Parent 2:
c) Offspring Phenotype:
Recessive Allele:
5. Spotted coat is dominant over solid coat in rabbits. A heterozygous rabbit is crossed with a homozygous
dominant rabbit.
Characteristic:
a) Parent 1:
b) Offspring Genotype:
Traits:
Dominant Allele:
Parent 2:
c) Offspring Phenotype:
Recessive Allele:
6. Short tails are recessive to long tails in dogs. Two short tailed dogs breed.
Characteristic:
a) Parent 1:
b) Offspring Genotype:
Traits:
Dominant Allele:
Parent 2:
c) Offspring Phenotype:
Recessive Allele:
7. Short fur is dominant over long fur in cats. A homozygous short furred cat is crossed with a homozygous
long furred cat.
Characteristic:
a) Parent 1:
b) Offspring Genotype:
Traits:
Dominant Allele:
Parent 2:
c) Offspring Phenotype:
Recessive Allele:
8. Wrinkled seeds are recessive to smooth seeds. A heterozygous smooth seed is crossed with another
heterozygous smooth seed.
Characteristic:
a) Parent 1:
b) Offspring Genotype:
Traits:
Dominant Allele:
Parent 2:
c) Offspring Phenotype:
Recessive Allele:
9. In mice, the ability to run normally is a dominant trait. Mice with this trait are called running mice. The
recessive trait causes mice to run in circles only. Mice with this trait are called waltzing mice. A
heterozygous running mouse is crossed with a waltzing mouse.
Characteristic:
a) Parent 1:
b) Offspring Genotype:
Traits:
Dominant Allele:
Parent 2:
c) Offspring Phenotype:
Recessive Allele: