centimorgans for a man is important? How many
it for you. If you like this video, be sure to give it a
3,700 but because of how you're calculating it with the strict
centimorgans for a woman is important and then when we're
because that would really make things confusing if you had to
remember, was this a man or is this a woman and how many
then women have in their genome now together it averages about
genome is reported differently by each of the different
that are much farther apart per centimorgan. On the opposite
genealogy, all of the companies have decided to treat men and
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actually makes sense that men have less centimorgans than
women the same as far as reporting the centimorgans
women have. Thankfully though, when it comes to genetic
how men have much lower centimorgans in their genome
there are so many ways to calculate this, each company
really doubled so would be 7,400 centimorgans overall but if you
around the 3,700 centimorgans per human genome and that's
has their own way of calculating it. Most of them at
calculates the amount of centimorgans on each chromosome
it at multiple companies, you will see that each company
have noticed strange about centimorgans. If you have test
F of the recombination and crossovers for generations, it
probability of recombination between two points and because
it, one of his students named this trait, this genetic
things he looked at was this idea of recombination or
mind that when you're talking about centimorgans, we're
just use the centimorgan. Now, there's some things you may
distance, the morgan. Now, we don't use the morgan. We really
really just talking about genetic distance. Chance of a
about 920,000 base pairs per centimorgan. Again, some places
along that chromosome are less, some places are more. Keep in
mind depending on your chromosome and depending on
centimorgan is equivalent to a 1 percent probability of a
widely for instance on chromosome number 19 it only
number of millions, that is the number of basis and that is an
we're talking about DNA and we mention mega basis or base
five hundred 30,000 base pairs per centimorgan but that's for
described as a length of genetic distance and it's
different studies on the fruit flies. So, what is a
happening between two points on your DNA. So for instance, one
have a 1% probability of having a recombination happen between
for flies but the nice thing about fruit flies is they're
centiorgans is related to the probability of a recombination
absolute distance. Centimorgans is not the same thing.
pairs, that's talking about an absolute distance. So, if we
distance. Usually when we're talking about genetics and
fruit flies but he did it so much that fruit flies became a
segment of DNA. Now, every area of study has its own set of
Howdy, I'm Andy Lee with Family History Fanatics and this is a
important to keep this separate from a length of absolute
and that's where Thomas Morgan and of his students did their
ten centimorgans and you wondered what the heck is a
forefront of genetic science. He wasn't the first one to use
fact, he was probably the one that brought fruit flies to the
jargon and genetic genealogy is no different. Today, I want to
where you're at on each chromosome that amount can vary
thumbs up so they can reach more viewers. Don't forget to
in DNA, put it in the comments below and we'll try to answer
questions about centimorgans or how we measure genetic distance
can get really confusing that way. So, if you have any other
comparing men and women, if they have this match, it's It
check out this scientist calculation he actually shows
absolute distance sometimes you might read that on average a
centimorgan is about 1 million base pairs but bear in
companies and again, that's because it has to do with the
differently and so the total centimorgans for the human
crossover between different pairs of chromosomes and since
centimorgans get named for Thomas Morgan? One of the
this genetic distance is related to the probability of
recombination happening between two points. Why did
end of the spectrum is chromosome number two which has
are much closer together per centimorgan and there's places
centimorgan? Well, a centiorgan sometimes is
start one at one end, and count on down til we get to whatever
the overall chromosome. There's places on that chromosome that
them then they are one centimorgan apart related to
recombination happening between two points so if two points
room at Columbia was not that big. It had about eight tables
giant place, you know, like a warehouse with all these things
studies. You may be thinking that this must have been some
had what was called the fly room where they did all these
staple in genetics. He taught at Columbia University and he
really small so they don't take up a lot of space. So, the fly
was a scientist who did genetic studies on fruit flies. In
came from. Now, the centimorgan is named for Thomas Morgan who look at the term centimorgan, what it means, and where it
Anybody ever told you you should be looking for more than
centimorgan?
History Fanatics.