Reflection: Real World Applications Inheritance Patterns (#3 of 6): Codominance - Section 3: Instructional Input/Student Activities


As discussed in the Anticipatory Hook section, blood typing seems to be inherently interesting to many students (and even people at large). It is quite personal and could be life-altering in cases of transfusion and certainly helped to deduce parentage in the "pre-DNA fingerprinting" era.

Student A (one of two featured in this series) shows that she understands how to model the genetic transmission of alleles that code for blood type.

In problem #3 she correctly codes and solves for the genotypes of various blood types in the story problem. She also infers the various genotypes for problem #5 (despite an oversight of the possible heterozygous genotype (Type A) for the baby (#5c) and correctly concludes that, according to the evidence provided here only, the baby was not switched at the hospital. Furthermore, she clearly knows how to process the information given and produce predictions for the F1 generation in each problem (#6-8, p. 4 & #1-5, p. 5).

  Real World Applications: Who's your Daddy? Blood type just might answer that question!
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Inheritance Patterns (#3 of 6): Codominance

Unit 4: 3) Genetics ("Identity & Change")
Lesson 7 of 10

Objective: 1. Students will apply concepts of statistics and probability to explain the variation and distribution of expressed traits in a population. (HS-LS-3) 2. Students will understand that cells store and use genetic information to guide their functions. An organism’s genotype determines its phenotype. These traits can be dominant or recessive depending on the alleles found on their genes.

Big Idea: Nearly all human traits, even many diseases, are inherited in predictable ways. Using the tools of mathematics and modeling, these inheritance patterns can be properly deduced.

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3 teachers like this lesson
Science, Heredity, Punnett Squares, incomplete dominance, Sex-linked, Genetics, genetics, pedigrees, Monohybrid Crosses, Dihybrid Crosses, Complete dominance
  55 minutes
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