Student ExplorationChicken Genetics

Name: ______________________________________ Date: ________________________

Student Exploration: Chicken Genetics

Vocabulary: allele, codominance, dominant, genotype, heterozygous, homozygous, phenotype,

probability, Punnett square, recessive, trial

Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

1. The image shows a flower that was produced by crossing

a pure red flower with a pure white flower. Which do you

think is the dominant petal color: red or white? Explain.

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2. How is the inheritance pattern shown by this flower different from other inheritance patterns

you have seen or studied? ___________________________________________________

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Gizmo Warm-up

There are many different ways traits can be inherited. Some traits are

governed by alleles that are dominant over other alleles. Other traits are

governed by alleles that share dominance. These alleles follow a pattern of

inheritance called codominance. With the Chicken Genetics Gizmo™, you

will study how codominance affects the inheritance of certain traits.

1. Turn on Show genotype. The genotype is the allele combination an

organism has. Point to the red chicken.

A. What is the red chicken’s genotype? __________________________

B. What is the white chicken’s genotype? ________________________

2. What do you think the letters F, R, and W stand for in the genotypes?

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Fr Fr

FW FW

F stands for feather, R stands for red, and W stands for white

Red because thier is more red.

they show characteristic form both parients.

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