1. What Is The What Are The Odds Tool?

The "What Are The Odds" (WATO) tool is a probability calculator that helps genealogists evaluate possible relationships between DNA matches when the exact relationship isn't known.

2. How Does The Calculator Work?

The calculator uses statistical models based on:

• Amount of shared DNA (in centimorgans)
• Number of shared segments
• Known relationships in the family tree
• Population genetics data

Explanation: The tool compares the observed DNA sharing pattern against various possible family trees to determine which relationships are most probable.

3. Importance Of Relationship Probability

Details: Understanding relationship probabilities helps genealogists focus their research on the most likely family connections and avoid false leads.

4. Using The Calculator

Tips: For best results, enter the total shared cM and number of segments from your DNA test. Include any known relationships if available.

5. Frequently Asked Questions (FAQ)

Q1: What DNA testing companies can I use with this?
A: The calculator works with data from any major testing company (Ancestry, 23andMe, MyHeritage, FTDNA) as long as you have the shared cM values.

Q2: How accurate are the probabilities?
A: They represent statistical likelihoods based on population averages. Actual relationships may vary in specific cases.

Q3: Can I use this for unknown parent searches?
A: Yes, it's particularly useful for evaluating possible relationships in adoption or unknown parentage cases.

Q4: Why does segment count matter?
A: More segments at the same total cM often indicates a more distant relationship than fewer larger segments.

Q5: How should I interpret the results?
A: Consider probabilities as guidelines, not certainties. Combine with traditional genealogical research for best results.