1 / 11

Mendel’s Contribution(s)?

Mendel’s Contribution(s)?. Mendel’s First Postulate. Unit Factors in Pairs Genetic characteristics are controlled by unit factors that exist in pairs in individual organisms, each individual receives one unit factor from each parent,

drew
Download Presentation

Mendel’s Contribution(s)?

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. Mendel’s Contribution(s)?

  2. Mendel’s First Postulate Unit Factors in Pairs • Genetic characteristics are controlled by unit factors that exist in pairs in individual organisms, • each individual receives one unit factor from each parent, • in a monohybrid cross, three combinations of unit factors are possible,

  3. Mendel’s Second Postulate Dominant/Recessive • When two unlike unit factors are present in a single individual, one unit factor is dominant to the other, which is said to be recessive.

  4. Mendel’s Third Postulate Segregation • During the processes of heredity, the paired unit factors separate so that the offspring receives one unit factor from each parent, • The unit factors segregate to offspring randomly.

  5. Mendel’s Forth Postulate Independent Assortment • How do two traits segregate in the offspring of an individual that is heterozygous for both traits?

  6. Forked-Line MethodHaplo/Diplo and complementation Both recessive: aaDD x Ad  female: AaDd, male aD Both Dominant: aaDD x Ad  female: AaDd, male aD One dominant*: aadd x AD  female: AaDd, male ad or… AADD x ad  female: AaDd, male AD * need to define which is dominant!

  7. 1/2 x 1/2 = 1/4 AD ½ D ½ d 1/2 x 1/2 = 1/4 Ad 1/2 A 1/2 D 1/2 x 1/2 = 1/4 aD ½ d 1/2 x 1/2 = 1/4 ad 1/2 a Forked-Line MethodHaplo/DiploAaDd

  8. 1/2 x 1/2 = 1/4 AD ½ D ½ d 1/2 x 1/2 = 1/4 Ad 1/2 A 1/2 D 1/2 x 1/2 = 1/4 aD ½ d 1/2 x 1/2 = 1/4 ad 1/2 a Forked-Line MethodHaplo/DiploAaDd x AD* (*male genotype could be ad, aD, Ad) 1 AD = ¼ ADAD 1 AD = ¼ AdAD 1 AD = ¼ aDAD 1 AD = ¼ adAD

  9. LabLife Cycles

  10. Wasp Development Timelines18o, 28o C

  11. C. elegans Nomenclature Tower of Babel

More Related