Mendel's law of Dominance & Segregation Video Lecture - NEET

hello friends this video on principles
of inheritance part 12 is brought to you
by exam for calm
no more fear from exam so now based on
the monohybrid cross or based on this
experiment performed by Mendel he gave
very important principles of the heavens
and these were the basic principles of
genetics and what by those principles
there were law of dominance and law of
segregation so these were the two very
important principles or laws whatever
you call them in the field of genetics
so things were the first laws you can
say which would actually see that how
the traits are being passed on from one
generation to the next generation so let
us look at each of these laws one by one
first we'll talk about law of dominance
so what is there in law of dominance and
see is that in heterozygous organisms
only one out of the two enemies
expresses itself and whichever expresses
itself is what the dominant trait while
the other which remains hidden is for
the recessive trait by now I think I
don't really explain this low again
because I already spoke about it so
wherever it is applicable only for
heterozygous organisms because for
homozygous there is no doubt you already
know what will be the phenotype right
because in Versailles this border and
these are the same so obviously that I
mean will express itself but in
heterozygous since you have two
different alleles so there is a doubt
which will Express so the one who is
dominant will Express so that was the
law of turbulence so so this is what was
observed in the Mendel's first
experiment where when a tall plant that
is the whole cycle straw was crossed
with the homozygous dot it was seen that
all the plants were 12
so while there all of them taught that's
because even though they were all
heterozygous that is they had one
dominant allele and one other one
recessive but still capital ki was a
dominant trait and small p was a
recessive trait that is why capital T
got expressed and the plants were all
doll
one generation so this was the norm of
dominance due to this law the door trade
was given in the f1 generation the net
flow is law of segregation segregation
segregation means separation so this law
states that each and retains its
distinct identity even though they
remain together now when you talk about
energy whether you talk about this or
you talk about this now each Eddy has
its own identity they do not blend with
each other as this was asked well
Mendel's law he said that if faculty is
coming with small team that can they
always stay together right because as we
know n each do not exist singing and
editing their forms the G but that
doesn't mean that faculty and small team
is blend together and it will form a new
thing like you might think it in this
way also that twelve lines can mix with
a tall tree can mix with advantage to
form an intermediary but nothing like
this was happening as permanent so as I
mentioned there was no blending of the
angles even though to an inch worth
present together but each of them were
complaining their own identity and that
is why in the first generation they
exactly resembled one one particular
tree whereas in the f2 generation they
they whatever was being produced they
resembled the initial I mean like if if
it was taught that if God which was
being observed in f2 generation that
exactly resemble the parental dot then
so you say that the L will never blend
with each other and they try to maintain
their own identity so it's a they even
though they remain together in an
individual they segregate only doing
gamete formation so that was the law of
segregation that adults only saving it
for gamete formation but otherwise they
always remain together to form the gene
there but they always retain their own
distinct identity so as its do not blend
so with this he is playing with the f2
generation so now the f1 lands which
were capital T small T capital T small T
they were crossed together and it was
found that the plant
that produced in the f2 generation what
happened to them most of them were tall
but around 25% of them where don't so
that is what was being observed so how
do you explain this we say that in a
hybrid tall grant so these type of times
which are heterozygous the word hybrid
is also used for heterozygous and maybe
in the same so what these hydro zygous
plants what happens they have two areas
which are different from each other when
we present story that he presents dwarf
it so they are together but then they
have their own identity so what in order
to generate the m2 generation gamete
formation has to take this and during
gamete formation T and T capital T and
so on T they segregate only during
gamete formation but again after fusion
they they group with love
other than pair so basically they retain
their identity so if capital T is fought
tall so they will always represent tall
only so even if it is present with slow
and key there is no blending between the
enemies so this was what was told by
Mendel so my girlfriend gave these two
laws defecting common based on his
experiments on monohybrid cross
so with monohybrid cross we say that doc
law of turbulence and his one trait will
dominate over the auditory and the
second was the law of segregation that
is the end instant segregate during
gamete formation however so these are
the first loss in the field of genetics
as I mentioned before but later other
scientists also came up and they also
started doing a lot of research on
genetics and then it was found that
meant I would not say that Mendel's
always incorrect but
Mendel's law may not complete their webs
and animals
it was seen that there was blending
between the enemies so blending was
found to later so there were also
scenarios when it was seeing that the
segregation which Mendel was talking
about was correct but it was partially
correct so all those things which we
will see as we go ahead so this is what
Beck was given by Wendell with respect
to monohybrid cross thank you please
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