What Is a Good Prediction?

Key to understanding how new relationship predictors perform is an understanding of how probabilities work One time I was sitting and waiting for class to begin in one of many advanced statistics courses I took. The professor entered and started class with something...

No Recombination of X Chromosomes

What’s the probability that two children share one whole copy of the X chromosome without sharing a father? I’ve made an X chromosome model that predicts shared X DNA percentages and ranges for various ancestors, but I haven’t yet calculated ranges...