Tag: genetics
-
Modeling Independent Assortment & Dihybrid Crosses
Students examine how two traits are inherited, revealing that each allele has an equal chance of being passed on to the next generation, the principle of independent assortment.
-
Investigation: Modeling Heredity with Popsicle Sticks
In this activity, you will use popsicle sticks to model the process of gamete formation and the combining of sperm and egg to create offspring. Results of the simulation can then be compared to Punnet square expected results. Popsicles should be made in advance, the set contains a male and female set with the genotypes…
-
Simple Mendelian Genetics Practice Problems
Students learning basic Mendelian genetics can practice assigning genotypes and identifying heterozygous and homozygous configurations. Squares are set up to do crosses with purple and white flowers as seen in Mendel’s pea plants. The worksheet is very simple, designed for beginning students of biology and genetics. More difficult versions of genetics practice problems might…
-
Case Study: Why Are There No Male Calico Cats?
This presentation case study asks two important questions regarding cat coloration: The case is presented as a slide presentation where students consider evidence and data related to cat coloration and chromosomes. Working in small groups, they discuss the case and eventually answer the two main questions. I usually collect their answers at the end of class…
-
Inquiry in Genetics Using Wisconsin Fast Plants
Genetic Experiments can be intimidating for teachers due to the time and cost of breeding plants or animals in a classroom. These issues are further complicated in a public school setting which may have space issues, limited funds, and lack of access to labs. My favorite model for genetic experiments is the Wisconsin Fast…
-
AP Biology – Investigation on Genetics with Plants
A modified AP Lab where students learn to grow plants from a seed, cross pollinate plants and conduct an inquiry investigation about plant genetics.
-
Corn Genetics and Chi Square Analysis
Students count kernels on an ear of corn. The corn is the product of a dihybrid cross, so that the phenotype of the kernels will follow a 9:3:3:1 ratio.
-
Dihybrid Crosses in Guinea Pigs
Teaching dihybrid crosses can be challenging because it involves layering several biological concepts, like independent assortment and statistics. This worksheet illustrates how gametes are formed from the parents and used to create a 4×4 punnet square that is used in basic genetic problems.
-
Simple Experiment to Extract DNA from a Strawberry
Crush strawberries and use detergent to break the cell wall, releasing DNA. Alcohol is then poured slowly over the top of the solution and DNA will rise to the surface.