The Centimorgan to Percentage Calculator helps determine the probability of a genetic relationship based on centimorgan values. Centimorgans (cM) are used in genetics to measure genetic linkage, and converting them into percentages can offer insights into shared DNA.
Formula
The formula for converting centimorgans to percentage is:
Percentage = (cM / Total cM) * 100
Where:
- cM represents the centimorgans shared.
- Total cM is the full length of autosomal DNA considered in the calculation.
How to Use
- Enter the centimorgans (cM) value in the first input box.
- Enter the total centimorgans (T) in the second input box.
- Click the “Calculate” button.
- The result will display the percentage of shared DNA.
Example
If two individuals share 150 cM and the total centimorgans in the genome is 7000 cM, the calculation will be:
Percentage = (150 / 7000) * 100 = 2.14%
FAQs
- What is a centimorgan (cM)?
A centimorgan is a unit of measurement for genetic linkage. - Why is total centimorgan important?
It provides a reference point to determine the proportion of shared DNA. - Can this calculator determine relationships?
It can give an idea, but professional genetic analysis is recommended. - What is the typical total cM for humans?
The average human genome has about 7000 cM. - Is a higher percentage always indicative of close relationships?
Generally, yes, but it depends on inheritance patterns. - Can this formula be used for all species?
No, it is designed for human genetic calculations. - What if my result is 0%?
This means no significant genetic relation is detected. - Can I use this for half-siblings?
Yes, but other genetic tests might be needed for confirmation. - How accurate is this calculator?
It provides an estimate, but professional testing is recommended. - Does shared DNA always mean a direct relation?
Not always, as distant ancestry can also contribute to shared cM values.
Conclusion
The Centimorgan to Percentage Calculator is a helpful tool for understanding genetic connections. While it provides useful estimates, deeper analysis is needed for precise relationship determination.