Monohybrid & Test Cross Practice WS 1A Name: ______________________________
Honors Biology – Introduction to Genetics
Objective: In this activity you will practice with one trait crosses (monohybrid) as well as test crosses.
Use the following diagram to answer questions 1-5.
1. Describe the following monohybrid cross of plants.
(What single trait is being considered?)
2. Compare the appearance of the plants in the F1
generation with those in the F2 generation.
3. What did Mendel call the observed trait and the trait that
seemed to disappear (masked) in the F1 generation?
4. What is the phenotype and the genotype of the F1
generation?
5. Why does the trait for shortness seem to “skip a
generation?”
6. In dogs, a dominant gene (W) produces wire-haired texture. The recessive allele (w) produces smooth
hair. A homozygous wire-haired male is mated to a female with smooth hair. Show the punnett square.
What genotypes and phenotypes are expected in the F1 generation, and in what ratios?
Genotypes:
Phenotypes:
7. Short hair (L) is dominant over long hair (l) in rabbits. Two heterozygous rabbits are mated.
Show the punnett square. What phenotypes are expected, and in what ratios of the bunnies produced?
Genotypes:
Phenotypes:
