1 / 9

Extending Mendelian Genetics

Mendelian Genetics. Extending Mendelian Genetics. C W C W. C R C R. C R C W. Incomplete Dominance. Heterozygous phenotype is intermediate. C W C W. C R C R. C R C W. C R C W. C R C W. Incomplete Dominance. 1 : 2 : 1. Codominance.

sine
Download Presentation

Extending Mendelian Genetics

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. Mendelian Genetics Extending Mendelian Genetics

  2. CWCW CRCR CRCW Incomplete Dominance • Heterozygous phenotype is intermediate

  3. CWCW CRCR CRCW CRCW CRCW Incomplete Dominance 1 : 2 : 1

  4. Codominance • The heterozygous phenotype represents both alleles • Cattle coat color Alleles C = Red coat C’ = White coat Genotype C’C’ CC CC’

  5. Codominance • Tay-Sachs Disease Alleles T = functional lipase T’ = dysfunctional lipase GenotypesmPhenotypeMPhenotype T’T’ TT TT’ lipid buildup in brain (fatal) catabolism of lipids (normal) catabolism of lipids (normal)

  6. Multiple Alleles • More than two alleles exist for a gene • Human blood type

  7. Multiple Alleles Genotype Antibodies Blood Type

  8. Polygenic Traits • Human Skin Color • Controlled by at least 3 genes (A, B, and C) • AABBCC = Darkest • 6 copies of melanin-producing alleles • aabbcc = Lightest • 0 copies of melanin-producing alleles • Like other traits, environment is a significant factor in expression

More Related