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Incomplete Dominance Teacher Resources
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What happens when two cats collide? It depends on whether they exhibit codominance or incomplete dominance! Genetics learners are briefly introduced to the these two concepts and are given a scenario to solve. This handout can be used in your biology lesson as you are introducing dominance that differs from Mendel's original observations.
A girl without freckles is like a night without stars! On this activity, junior geneticists determine how many of the offspring of a freckle-faced father and a freckelless mother. They also write out answers to questions about Mendel's experiments, incomplete dominance, and codominance. This handout provides a well-rounded review of genetics concepts. Add it to your collection of choice homework assignments.
A two-page worksheet provides seven Punnett squares for practice in determining genotypes and phenotypes. Each is an example of incomplete dominance or codominance. After your bright biologists have mastered Punnett squares, this will take them to the next step. Assign it as homework or use it as an assessment after some time have been invested in these genetics concepts.
Students participate in an activity where they flip coins to determine which allele they pass on to the F1 generation and draw the resulting child's face. They identify several inheritance patterns including dominant, recessive, incomplete dominance, polygenic, sex-linked, and epitasis.
What do you get when you cross a purple with a white? Genetics geniuses figure it out with a Punnett square. On this assignment, they must solve crosses for incomplete dominance, codominance, lethal dominance, and sex-linked genes. It is a rare worksheet as most Punnett square practice pages involve only simple crosses. You will want to include this in your arsenal of genetics homework assignments.
In this basics of genetics worksheet, students review the concepts of genetic inheritance by writing the alleles for genetic traits inherited in offspring. They identify dominant and recessive traits given allele pairs, answer five questions about genetic crosses, practicing monohybrid and dihybrid crosses, and complete sex-linked and incomplete dominance crosses.
In this genetics learning exercise, students answer a variety of questions about genotypes, phenotypes, genetic inheritance, and traits. They solve for the probability of genotypes and phenotypes of offspring by completing monohybrid and dihybrid crosses. They answer questions about sex linked traits, incomplete dominance and pedigree charts.
Students describe the differences between incomplete dominance and codominant alleles, and between multiple alleles and polygenic inheritance. They describe how internal and external environments affect gene expression. They then interpret testcrosses and pedigrees charts.
Students draws the child's face and compares "mother's" and "father's" perception of characteristics. One student draws the child's face; partner writes a biography of the child at age 30- what is the child like, what have they accomplished, what are their dreams.... Students discuss how they feel about their parents and their perceptions of parenthood.
Students use the internet to research a specific type of genetic problem they have read about. In groups, they use their textbook to analyze the characteristics of new vocabulary and concepts. They develop a solution to the genetics problem and share their information with younger students.
Students solve problems like the following examples: 1. If you have 10,000 women, age 30, who have babies and one in 900 of these births will result in a Down syndrome baby, how many will have this disease? 2. 5,000 babies are born; 2,000 to women age 20, 3,000 to women age 40. How many of each group will give birth to a Down syndrome baby?
The students determine probabilities and ratios of various genetic crossings. In this genetic lesson, 9th graders determine the relationship between the parent generation and the offspring. They understand the effects of dominance, co-dominance, incomplete dominance, and multiple alleles.