Gizmos ël Name: Macayla Goodman Date: 1-26-2023 Student Exploration: Mouse Genetics (One Trait) Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: allele, DNA, dominant allele, gene, genotype, heredity, heterozygous, homozygous, hybrid, inheritance, phenotype, Punnett square, recessive allele, trait Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. The image shows a single litter of kittens. How are they similar to one another? They are similar because they are all cats, have white fur, and are the same ages. 2. How do they differ from one another? Photo by Mila Zinkova They differ because they each have a different pattern. 3. What do you think their parents looked like? I think their parents looked similar to them, and the kittens are variations of them. Gizmo Warm-up Heredity is the passage of genetic information from parents to offspring. The rules of inheritance were discovered in the 19th century by Gregor Mendel. With the Mouse Genetics (One Trait) Gizmo™, you will study how one trait, or feature, is inherited. 1. Drag two black mice into the Parent 1 and Parent 2 boxes. Click Breed to view the five offspring of these parents. What do the offspring look like? Exactly like the parents, all black. The appearance of each mouse is also called its phenotype. 2. Click Clear, and drag two white mice into the parent boxes. Click Breed several times. What is the phenotype of the offspring now? The phenotype of the offspring is all white. 3. Do you think mouse offspring will always look like their parents? Explain: Yes and no. Yes because they will inherit traits from them. No, because depending on the Reproduction for educational use only. Public sharing or posting prohibited. @ 2020 ExploreLearning™ All rights reserved
alleles of the parents, their appearance could differ. Activity A: Patterns of inheritance Get the Gizmo ready: · Click Clear. . Drag a black mouse and a white mouse into the parent boxes, but don't click Breed yet. Question: What patterns are shown by offspring traits? 1. Predict: What do you think the offspring of a black mouse and a white mouse will look like? I think that some mice will be black, and some will be white. 2. Observe: Click Breed several times. What do you see? They are all black. 3. Observe: Drag two offspring into the Holding Cages. These mice are called hybrids because their parents had different traits. Click Clear, and then breed the two hybrids. What do you see now? Most are black, but some are white. 4. Experiment: Turn on Show statistics. Click Breed until there are 100 offspring. How many offspring were black? 77 How many were white? 23 5. Explore: Try other combinations of mouse parents. Write the results of each experiment in your notes. When you have finished, answer the following questions. (Note: You can refer to the parents as "pure black," "pure white," or "hybrid.") A. Which parent combination(s)