Patterns of Inheritance

Click "Download" in the upper right, save, and open in

MS Word (preferred) or Google Docs. This version is not editable.

Lab 8 Data Sheet

Name: _________________ Date: _______________

INITIAL KNOWLEDGE CHECK

LAB DATA QUESTION 1. Table 8-1: Assess your understanding of the concepts.

Term	Unfamiliar	Somewhat Familiar	Proficient	Expert
Gene
Allele
Genotype
Phenotype
Complete Dominance
Incomplete Dominance
Codominance

Problem 1: Round seeds (R) are completely dominant over wrinkled seeds (r). You cross a plant that is homozygous for round seeds (male) with a plant that is heterozygous for round seeds (female).

Write down the phenotypes as you complete the problem

Punnett Square

Problem 2: Green pods (G) are completely dominant over yellow pods (g). You cross a plant that is heterozygous green pods (male) with another plant that has homozygous for yellow pods.

Write down the phenotypes in the Punnett square as you complete the problem

Punnett Square

Problem 3: Inflated pods (I) are completely dominant over constricted pods (i). You cross two heterozygous (one male and one female) pea plants.

Write down the phenotypes in the Punnett square as you complete the problem

Punnett Square

Problem 4: Round seeds (R) are completely dominant over wrinkled seeds (r). If a male pea plant is heterozygous for round seeds, can any of this plant’s offspring have round seeds? Wrinkled seeds? Think about the different genotypes (females) with which you can cross the heterozygous parent: homozygous dominant, heterozygous, and homozygous recessive.

What is the genotype of the male plant? ____

Unknown female plant, list the three possible genotypes:

____, ____, ____

· Use the same “Dad” but use a different “Mom” for each cross.

· Write down the phenotypes as you complete each square

Punnett Square

Punnett Square

Punnett Square

Problem 5: Yellow seeds (G) are completely dominant over green seeds (g). You cross two pea plants (male and female) that are heterozygous for green seeds.

Write down the phenotypes in the Punnett square as you complete the problem

Punnett Square

Problem 6: Tall plants (T) are dominant over short plants (t). You cross a tall plant (male) with a short plant (female).

List the Possible Male Plant Genotype(s) ____, _____.

Genotype Short Female Plant. ______

· Use a different “Dad” but use the same “Mom” for each cross.

· Write down the phenotypes in the Punnett square as you complete the problem

Punnett Square

Punnett Square

Problem 7: Mrs. and Mr. Williams both have widow’s peaks (W). Their first child also has widow’s peak, but their second child doesn’t. Mr. Williams accuses Mrs. Williams of being unfaithful to him. Is he justified? Why or why not?

· What are the possible genotypes for Mrs. and Mr. Wilson? ____, ____

· What are the possible genotypes for the child with a widows peak ____, ___

· What is the possible genotype for a child without a widow’s peak ____

· Is there a cross between Mrs. and Mr. Wilson that produces a child with a widow’s peak?

Punnett Square

INCOMPLETE DOMINANCE IN MONOHYBRID CROSSES

Problem 8: A plant can have red flowers (RR), white flowers (rr), or an intermediate phenotype of pink (Rr). A white plant is crossed to a pink plant

Write down the phenotypes as you complete the problem

Punnett Square F1 Generation

Problem 9: Dogs can have straight hair (AA), curly (aa), or an intermediate phenotype of wavy hair (Aa). A straight-haired dog mates with a curly haired dog.

Write down the phenotypes as you complete the problem

Punnett Square F1 Generation

Problem 10: Cows can be red (RR = all red hairs), white (WW = all white hairs), or roan (RW = red & white hairs together).  A red cow is crossed to a purely white cow.

Write down the phenotypes as you complete the problem

Punnett Square F1

Problem 11: The lubber grasshopper can have red stripes (RR), yellow stripes (YY), or red and yellow stripes (RY).  A red & yellow-striped grasshopper is crossed to a yellow-striped grasshopper.

Write down the phenotypes as you complete the problem

Punnett Square F1 Generation

Problem 12: Round seeds (R) are completely dominant over wrinkled seeds (r). Green pod color (G) is completely dominant over yellow color (g). You cross a male plant that is homozygous for round seeds and yellow pods to a female plant that has wrinkled seeds with pure breeding (homozygous) green pods.

· Male Genotype: ______ Female Genotype: ______

· What are the gametes produced by the male and female plants?

· What are the genotypes of the F1 generation?

· What are the phenotypes of the F1 generation?

Problem 13: Round seeds (R) are completely dominant over wrinkled seeds (r). Green pod color (G) is completely dominant over yellow color (g). You cross a male plant that is heterozygous for round seeds and heterozygous for green pods back to itself.

Write down the phenotypes as you complete the problem

Punnett Square

POST LAB KNOWLEDGE CHECK

Table 2: Assess your understanding of the concepts.

Term	Unfamiliar	Somewhat Familiar	Proficient	Expert
Gene
Allele
Genotype
Phenotype
Complete Dominance
Incomplete Dominance
Codominance

Post-Lab Assignment Submission Instructions:

Once you have finished this lab activity, you will need to submit your answers using the post-lab assignment on Canvas. Please follow these instructions:

1. You will turn in this document, the lab data sheet. Be sure and save it as a PDF file before submitting.

2. Upload the PDF file of your completed Punnett Squares to last question on Post Lab 8 in Canvas for submission.

By following these steps, you will successfully submit your post-lab assignment for assessment.

1

5