AGRO412/812 Crop and Weed Genetics - Incomplete, testing case

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AGRO412/812 Crop and Weed Genetics - Incomplete, testing case

Lesson Outline

Faculty/Instructor

Deana Namuth-Covert
Professor, Director of Online Education and Outreach, The Ohio State University; Agronomy & Horticulture Adjunct Professor, University of Nebraska
dcovert2@unl.edu

New Feature to eLibrary 2011-01-26
Deana Namuth-Covert

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Concept 5: Individuals can be homozygous or heterozygous.

Homo means same and hetero means different. Zygous stands for zygote. If genes are in pairs in somatic cells and genes can have alleles, different genetic combinations can occur. An individual can have two copies of the same allele (homozygotes AA or aa) or they can have two different alleles (heterozygote Aa). The genetic makeup of an individual at specific gene pairs is called the genotype.

Fig. 8: A somatic cell from an individual who is heterozygous at the B,b gene pair and homozygous at the A gene pair..

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This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, adminstered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the USDA or NSF.

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