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Punnett_Monkey 1.0 is a Java program written by Harrell Lee Sellers and copyright is retained by the author. The duck version includes genes for domestic and Muscovy ducks. Following R.D. Crawford in Poultry Breeding and Genetics, Elsevier, 1990, the term "Domestic Duck" is used to describe the ducks related to the Mallard. Muscovy ducks are considered separately. The gene lists used in Punnett_Monkey_forDucks orders the domestic duck genes first and the Muscovy genes after the domestic duck genes.

Just choose the genes for the male and female parents by clicking the buttons. You will click through a list of duck genes (domestic duck genes first) in the order in which they appear in the tables of genes. You must select two genes for each parent. The sex-linked genes are first in the gene list. If you choose a sex-linked gene for the female, you must select the dash, -, for the other female gene. The plus sign indicates the wild-type gene. The 'hat' or shift-6 indicates a superscript.

Just try it! Select the four genes! If you make a mistake, just press your refresh button and start over.

Now all you have to do is click on the Do Punnett Square button. The genes are separated by a slash, which is a common notation. I use the dash notation to represent the female sex-chromosome, the W chromosome. I don't use 'W' as some people do because 'W' is also a gene symbol and that can be confusing. Separating the gene symbols with a slash then avoids having to write genotypes like b+- (it would be written here as b+ / -).

These are the gene combinations you will have in your chicks. Each one of the four quadrants represents 25% of the chicks. If some of the gene pairs are the same, and the order of writing them makes no difference, then add the two percentages together. Try making a sex-link bird! Breed a dark brown male to a wild-type female. Give the female the genes D+ and - (dash) and give the male two dark brown genes, d. The chicks that inherit the dash are the females! What color are the males and females in this cross? Now turn it around. Mate a dark brown female (genes d and dash) with a wild-type male (two D+ genes). What color are the male and female chicks now?