Inbreeding at One Locus - Full Sib Lines

Starting with AA and aa, two inbred lines differing at a locus, an F1 is produced. It is composed of individuals with genotype Aa. From each of 50 crosses, two parents (one female, one male) are taken. This is shown as the Parental Generation in the histogram. Two full sibs are then taken and crossed, under the controls of the buttons below. In this way full-sib lines are produced, and are tallied in the histogram. After all of the full sib lines are reproduced, the resulting generation of 50 full sib-lines (a total 100 individuals) can be "promoted" to be the parents of the next generation. A record is kept of each generation in the box at the bottom.

Click on the buttons below to proceed:

Parental Generation

Offspring Generation

Parent Parent
Offspring Offspring
When a full-sib line is chosen to reproduce, it is removed from the Parental Generation histogram. When full-sib offpring are produced, the genotypes are shown and the resulting line is added to the Offspring histogram. Click the "Run Continuously" button to get the effect of clicking the above buttons, in sequence, over and over until the all parental full sib-lines have produced offspring. Then the offspring need to be "Promoted" to produce the following offspring generation.
To start all over again click: and then proceed as before.

Thought Questions

Please send comments to   --henry schaffer
This exercise requires your browser to have JavaScript enabled. Copyright © 2000, 2017 by Henry E. Schaffer   Last modified 2/13/2017