okay genetic variation there are
multiple ways that genes can vary and
you know how this works but some
concepts that you want to take into
account our mutation and reproduction
mutation itself can alter you know that
the gene allele just you know some freak
mutation here and there you know just
maybe swapping out you know some of the
nucleotides are those kind of things now
the one that you really want to know a
little bit more is the reproductive
aspect of genetic variation and this is
these uh these are really important to
know one of them happens to be
independent assortment and this happens
during meiosis where the you know these
sister you know comb chromatids happen
to line up you know the the plate and
these can line up in you know any
assortment you know or order in which
they choose and you know this randomness
of alignment kind of contributes to the
genetic variation another way that it
can contribute to genetic variation is
something that we call crossing over and
when these two chromosomes you see how
they're crossing over right here and
then you know the black black
chromosomes kind of passing a little bit
of its of its genes onto this red one
this red chromosomes kind of past a
little bit of its genes onto this black
one that's called
crossing over and that can also help
create you know genetic variation we can
also think about you know like which
sperm fertilizes the egg cuz I mean
there's thousands of sperm that you know
don't make it you know one of that
thousand that obviously is genetic
variation as well as from a larger
standpoint which made the decide to
choose you know maybe you know they they
decide them you know the the made them
which they decide to choose you know has
a really big deal on a genetic variation
of their offspring
