# Thread: How many families / How many genetic lineages?

1. ## How many families / How many genetic lineages?

In the census of 2011 in Italy there are 59,433,744 inhabitants. Of these, 28,745,507 are men.

Considering that in a family there are more living men (grandfather / father / son / brother), how many families / genetic lineages are there in Italy?
Let me explain: how many men there are on average in the same family?

In my collateral genealogy there are about 40 living people who should have the same my Y-chromosome. They may, however, be many more people who have my same chromosome and therefore belong to my lineage / family.

If there were an average of 30 men at family you might calculate that in Italy there are about 1,000,000 families / lineages / Y chromosome

2. Originally Posted by Alessio B. Bedini
In the census of 2011 in Italy there are 59,433,744 inhabitants. Of these, 28,745,507 are men.

Considering that in a family there are more living men (grandfather / father / son / brother), how many families / genetic lineages are there in Italy?
Let me explain: how many men there are on average in the same family?

In my collateral genealogy there are about 40 living people who should have the same my Y-chromosome. They may, however, be many more people who have my same chromosome and therefore belong to my lineage / family.

If there were an average of 30 men at family you might calculate that in Italy there are about 1,000,000 families / lineages / Y chromosome
Probably a question for a statistician or computer scientist.
If you assume that there has been no migration into Italy or out of Italy you will get an answer..

There will be numerous people out there hwo have not tested, or never will test, paternal lines also die out if there is no male progeny...

If you have an assumption on average migration, deaths due to disease, war etc...you might be able to get an answer.

Personally I feel there are too many variables to know exactly.

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Ian B (11-12-2013)

4. Maybe a topic for demographers.
The population estimated between 950 and 1300 on the entire continent speak of a jump from 22 million to 54 million, the same estimates for France, we speak of an increase of 4 million inhabitants, five to nine, Italy for five to eight, for Germany from three to nine million.
If in X century there were 10-12 million males in Europe could mean that there were about 500,000 lineages / Y chromosome or less. They are the same that may be today.
In my opinion in Italy could be less than 80,000

5. The question should be how many Y-DNA SNPs are there in a country, when they arrived and have been continuously living there with a local trail of derived SNPs in the country ? What is the proportion of the SNPs in the population of the country ?

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N21163 (11-13-2013),  R. Walker (11-17-2013)

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