Student Exploration: Mouse Genetics (One Trait)
Vocabulary: allele, DNA, dominant allele, gene, genotype, heredity, heterozygous,
homozygous, hybrid, inh... [Show More] eritance, phenotype, Punnett square, recessive allele, trait
Prior Knowledge Questions (Do these BEFORE using
1. The image shows a single litter of kittens. How are they
similar to one another? Blue eyes, white sections,
2. How do they differ from one another? They all have different fur patterns and colors
3. What do you think their parents looked like? It is hard to decide because they all show such
different colors and patterns, but one could be orange black and white, and the other could
have a brown striping pattern
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?
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? white
3. Do you think mouse offspring will always look like their parents? no
Explain: sometimes the parent may carry a trait but not show it and they will pass it down, or
there could be a mutationQuestion: 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?
Either gray or spotted
2. Observe: Click Breed several times. What do you see?
They are 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? 73 How many were white? 27
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.”) [Show Less]