Gizmo Warm-up How long could a parrot survive in Antarctica? It would probably not survive long. Parrots do not have adaptations—or helpful characteristics—to survive icy cold weather. Because of this, a parrot is not fit for Antarctica. Fitness describes how well an organism can survive and reproduce in an environment. In the you will see how a can change Evolution: Mutation and Selection Gizmo™, species’ fitness over time as it becomes better adapted to its environment. On the SIMULATION pane, what is the Average fitness of the population? ________ On the CONTROLS pane, experiment with the Background color sliders. Which background color results in the highest fitness? ______________________ Which background color results in the lowest fitness? _______________________ Part A: Variation Introduction: An traits, or characteristics, are controlled by genes. Genes are located organism’s on rod-like structures called Different versions of genes that code for the same chromosomes. trait are called alleles. In this Gizmo, eight alleles control the color of bugs. Engage Question: Where does variation in a population come from? Get the Gizmo ready: Set the red value to 100, the green value to 255, and the blue value to 50 on the CONTROLS panel. Observe: Hold your cursor over one of the insects on the SIMULATION pane. The two structures under Genotype on the CONTROLS pane represent chromosomes. The three letters next to each chromosome represent alleles. Which alleles does the insect have? _______________________________________ The alleles carried on an chromosomes make up the genotype. organism’s organism’s Observe: An interact to produce a certain trait. The physical expression of organism’s alleles that trait is known as an phenotype. In the Gizmo, phenotype is expressed in RGB organism’s (red, green, blue) values. What is the phenotype of the insect? Red: ____ Green: ____ Blue: ____
Gizmo Warm-up How long could a parrot survive in Antarctica? It would probably not survive long. Parrots do not have adaptations—or helpful characteristics—to survive icy cold weather. Because of this, a parrot is not fit for Antarctica. Fitness describes how well an organism can survive and reproduce in an environment. In the Evolution: Mutation and Selection Gizmo™, you will see how a species’ fitness can change over time as it becomes better adapted to its environment. On the SIMULATION pane, what is the Average fitness of the population? ________ On the CONTROLS pane, experiment with the Background color sliders. Which background color results in the highest fitness? ______________________ Which background color results in the lowest fitness? _______________________ Part A: Variation Introduction: An organism’s traits, or characteristics, are controlled by genes. Genes are located on rod-like structures called chromosomes. Different versions of genes that code for the same trait are called alleles. In this Gizmo, eight alleles control the color of bugs. Engage Question: Where does variation in a population come from? Get the Gizmo ready: Set the red value to 100, the green value to 255, and the blue value to 50 on the CONTROLS panel. Observe: Hold your cursor over one of the insects on the SIMULATION pane. The two structures under Genotype on the CONTROLS pane represent chromosomes. The three letters next to each chromosome represent alleles. Which alleles does the insect have? _______________________________________ The alleles carried on an organism’s chromosomes make up the organism’s genotype. Observe: An organism’s alleles interact to produce a certain trait. The physical expression of that trait is known as an organism’s phenotype. In the Gizmo, phenotype is expressed in RGB (red, green, blue) values. What is the phenotype of the insect? Red: ____ Green: ____ Blue: ____
Student%20Packet_18_Laws%20of%20Segregation%20and%20Independent%20Assortment_L.16.1.docx