Corn genetics chi square goodness of fit test l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 17

Corn Genetics & Chi- Square Goodness of Fit Test PowerPoint PPT Presentation


  • 312 Views
  • Uploaded on
  • Presentation posted in: General

Corn Genetics & Chi- Square Goodness of Fit Test. Pedigrees and probability analysis to follow. Outline. Highlight some key points in syllabus Corn color and collection of data (phenotypes) Chi-Square Analysis. Corn genetics Lab. Application of Chi-Square Analysis.

Download Presentation

Corn Genetics & Chi- Square Goodness of Fit Test

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Corn genetics chi square goodness of fit test l.jpg

Corn Genetics &Chi- Square Goodness of Fit Test

Pedigrees and probability analysis to follow.


Outline l.jpg

Outline

  • Highlight some key points in syllabus

  • Corn color and collection of data (phenotypes)

  • Chi-Square Analysis


Corn genetics lab l.jpg

Corn genetics Lab


Application of chi square analysis l.jpg

Application of Chi-Square Analysis

  • The color pattern in corn is due to multiple genes

  • Are variations in number of observed phenotypes due to chance alone?


Objective l.jpg

Objective

  • Complete corn worksheet

  • Set up Punnett Squares using the genotypes given

  • Compare expected data to observed data

  • Perform Chi Square Analysis


Variation of colors why l.jpg

Variation of colors—Why?


Corn kernel color l.jpg

Corn Kernel Color

  • Color of aleurone masks endosperm color

  • Only with colorless aleurone can endosperm color be determined

  • Determined by several genes

  • Refer to genotypes in lab manual!


Slide8 l.jpg

Gene interaction can occur:Epistasis is a form of gene interaction in which one gene masks the phenotypic expression of another.


Today there are 3 crosses of corn l.jpg

Today there are: 3 crosses of corn

F1 X F1

Multiple alleles are tested for expression in F2 generation


Note color differences l.jpg

Note color differences

  • Cross C

  • Cross D (darker color is purple)

  • Cross F (call purple, may look red!)


Cross c l.jpg

F1 phenotype

F1 X F1 genotypes

Yellow

YYC’Rr X YYC’Rr

Cross C


Cross d l.jpg

F1 phenotype

F1 X F1 genotypes

Purple

yyPpRr X yyPpRr

Cross D


Cross f l.jpg

F1 phenotype

F1 X F1 genotypes

Purple

yyCcRr X yyCcRr

Cross F


Chi square statistical goodness of fit test l.jpg

Chi Square Statistical “Goodness of Fit Test”

  • Why do we use it?

  • .

  • To find out determine if probability are due to chance alone.

An example of how to calculate a Chi Square


Application of chi square l.jpg

Application of Chi Square


Genetic information regarding the corn color patterns are provided in your lab manual l.jpg

Genetic information regarding the corn color patterns are provided in your lab manual.

CORN WORKSHEET IS DUE 3/5


  • Login