Exam 2 (Chapters 6)

Genetics 311 with Emigh at North Carolina State University

About this deck

By: Amanda Whitley
Textbook: Genetics Notebook
Created: 2011-09-25
Size: 21 flashcards
Views: 17

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Formula: DCO

½(DCO)=1/2(r1)(r2)(C)

Formula: Single Crossover SCO

½(r1-DCO)

Formula: No Crossover

½(1-r1-r2+DCO)

Formula: Crossing over between outside loci

1/2[(r1-DCO)+(r2-DCO)]

Formula: No crossing over between outside loci

½(NCO+DCO)= ½(1-r1-r2+DCO+DCO)

Mapping distance make take what into account?

Map distance must take into account all crossovers (even silent ones)

Mapping function designed to

take into consideration that some multiple crossovers will be undetected among the offspring

Formula: R

r= distance between loci/100

Probability of event occurring vs. probability of a specific phenotype resulting (DCO)

The probability of the event ocurring would be the regular formula

DCO=r1r2C

The probability of a specific phenotype resulting would be the regular formula divided by 2 DCO=(1/2)r1r2C

How to determine NCOs when making a linkage map

paired gametes with the largest total

How to determine DCOs when making a linkage map

paired gametes with smallest total

How to determine SCOs when making a linkage map

paired gametes with intermediate totals

How to determine gene order

compare one NCO and one DCO with two shared phenotypes. The phenotype which differs between these is the middle locus; F1 will have NCOs on top and bottom of DNA strand

Formula: Calculating mapping distances

#DCOs+#SCOs (in common with the crossover between 2 genes)/TOTAL=r; then multiply by 100

Formula: Calculating C

C=Observed DCOs/Expected DCOs = #DCOs/(r1xr2xtotal)

cM can be thought of as

percent recombination

Recombination rate includes what?

only includes detectable recombinations (can't get larger than 0.5)

Loci that are located on the same chromosome are said to be ___

Linked

About this deck

By: Amanda Whitley
Textbook: Genetics Notebook
Created: 2011-09-25
Size: 21 flashcards
Views: 17

About StudyBlue

“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis