Is that my sister?

Exploring skin color, codominance, and meiosis

Meiosis

INTRODUCTION

Have you ever noticed some people have sibling that look very similar and some have sibling that look nothing alike?

If a family has 5 children, would you expect the children to all look alike?

EXPLORING THE PROBLEM

Directions: Take a look at the family images. Use the space available to share your thoughts. Why do some families look alike and others look different?

EXPLORING THE PROBLEM

EXPLORING THE PROBLEM

Share your thinking:

Why do some of these family members look similar and others looks different ?

VIDEO ANALYSIS

Video Analysis

Directions: We will watch a short video about co-dominance. After watching the video use the space available to answer the following questions:

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(a) What is Codominance?

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(b) What are examples of codominance?

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(c) How do they show up in humans?

VIDEO ANALYSIS

LAB PREP

Virtual Simulator

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In this lab, you will visit simulate a sequence of family reproductions. Your job is to choose 2 parents and watch teh possibilities of the phenotypical and genotypical outcomes for 5 parents.

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Step 1: Pick a pair of parents (for example parent 2 + Parent C)

Step 2: Use the simulator to identify what the offspring would look like. 

Step 3: After you see the offspring take a picture of the offspring.

Step 4: Repeat this process 5 times until you have 5 offspring:

LAB PREP

After you have your family of offspring answer the following questions:

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1. What patterns do you see from your offspring?

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• What evidence do you have that proves or disproves the concept of co-dominance?

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• What does this data reveal about the science of skin color?

LAB PREP

FAMILY DNA LAB

NURSERY PICTURES

Directions: After we all complete the building of our families we will put them together to take pictures of them.

PRACTICE EXPLANATIONS

Directions: In the moments that follow, work with a partner to record a 2-5 minute public service announcement explaining the science of skin color by explaining Codominance. In your explanation use words like (Allele, Codominance, Phenotype and Genotype).

VIDEO EXPLANATIONS