Mendel's F2 trifactorial data for seed shape (A: round or wrinkled), cotyledon color (B: albumen yellow or green), and seed coat color (C: grey-brown or white)

Description

The mendel3 data frame has 27 rows and 4 columns. Data are from Mendel (1886), and are reproduced in Fisher (1936) and Weir (1996).

Usage

data(mendelABC)

Format

This data frame contains the following columns:

seedshape

Factor with levels: AA, Aa and aa

cotylcolor

Factor with levels: BB, Bb and bb

coatcolor

Factor with levels: CC, Cc and cc

Observed

a numeric vector that holds the frequencies.

Details

The data are reviewed in detail in Fisher (1936). For a brief discussion, and references to work that revisits Fisher's conclusions, see Weir (1996).

Source

Data are from Mendel (1886), and are reproduced in Fisher (1936) and Weir (1996).

References

1. Fisher, R.A. 1936. Has Mendel's work been rediscovered? Annals of Science 1:115-137.

2. Mendel, G. 1886. Versuche uber Pflanzen-Hybriden. Verhandlugen des Naturforschenden Vereines in Brunn 4:3-47. (An English translation. with annotations, is available from http://www.esp.org/foundations/genetics/classical/gm-65.pdf NB also the English translation by Royal Horticultural Society of London, reprinted in Peters, J.A. 1959. Classic Papers in Genetics. Prentice-Hall.)

3. Weir, B.S. 1996. Genetic Data Analysis II. Sinauer.

Examples

## Lay table out as a 3D array, as in Fisher (1936)
abc <- aperm(array(mendelABC[,4], dim=c(3,3,3)), c(1,3,2))
dimnames(abc) <- list(B=c('BB','Bb','bb'), 
                      A=c('AA','Aa','aa'),
                      C=c('CC','Cc','cc'))
abc
## Fit Hardy-Weinberg disequilibium model
hwde(mendelABC, loci=c("seedshape","cotylcolor","coatcolor"))