1 / 8

Other Patterns of Inheritance

Learn about exceptions to Mendel's principles, such as incomplete dominance and codominance, and understand how the environment influences gene expression and trait determination.

mwilder
Download Presentation

Other Patterns of Inheritance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Other Patterns of Inheritance

  2. Learning Objectives • Describe some of the exceptions to Mendel’s principles. • Explain the environment’s role in the way genes determine traits.

  3. Incomplete Dominance Some alleles are neither dominant nor recessive. Incomplete dominance: One allele is not completely dominant over another.

  4. Codominance The phenotypes for both alleles are clearly expressed. Examples: chicken feather color, human protein controlling blood cholesterol levels

  5. Codominance vs Incomplete Dominance

  6. Multiple Alleles Many genes exist in more than two forms. Examples: human blood types, fur color in rabbits

  7. Polygenic Traits Many traits are produced by the interaction of several genes. Examples: eye color in fruit flies, coat color in dogs Traits typically show a wide variety of phenotypes.

  8. Genes and the Environment Environmental conditions can affect gene expression and influence genetically determined traits. The of an organism is only partly determined by its . phenotype genotype

More Related