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Engineering HSC and IIT-JEE Mains and
advanced videos. Hello students today we
are studying chapter genetic basis of
inheritance in that we are studying
topic Incomplete Dominance
now when I say Incomplete Dominance it
is also called as non-mendelian
inheritance why it is called non-mendelian
inheritance.
let's study and find out the answer to
it.
incomplete dominance not going to
Mendel's law there was codominance there
was dominance love independent
assortment which stated certain laws
which were clear and easy now there is
certain thing which is called as
incomplete dominance the definition for
incomplete dominance goes that if there
is a dominant allele present or a pair
of genes present which is completely
dominated now this completely dominant
genes a pair of allele will not hide or
mask it's a recessive counterpart or
it's recessive partners and it will
allow the expression only a little bit
in it's recessive counterparts let me
give you a simple example
for example if some one crosses a red
rose with a pink rose or you can say a
simple language red rose is crossed with
a white rose now red color is dominant
when the white color is recessive so
going to mend and slow we always say
that the dominant one will overpower
there is a say one and the dominant one
will be the color but we do also like
pink color in roses
we always seen that now that is an
example of incomplete dominance in
incomplete dominance would be observed
is the alleles of red rose never tried
to mask the alleles of the white rose or
you can say the red parent never tried
to hide the white parent comments or and
this results into another form of parent
or you can say another form of hybrid
this is the pink hybrid which is just
the combination of both of them now it
was called as non-mendelian inheritance
because when Mendel laid down all this
gloss he was very clear about certain
things like homozygosity
hetero zygosity dominant alleles
recessive alleles hybrids which clearly
does not follow this pattern of
incomplete dominance which was little
different from Mendel's point of view
the Mendel stated very clearly that the
dominant one or the strong one
we'll always appear in a generation
failure typically but this does not
happen over here what we observe is that
the dominant one allowed there is a same
one just to show its character even if
it's little bit
incomplete dominance now the law of
dominance clearly states that the strong
one or you can say whether it is
homozygous strong or than if this
heterozygous strong dominant allele will
always be expressed now this is just a
flip to the law of dominance which is
incomplete dominance which in simple
language states that the dominant one
will be seen in any generation but it
will not kill or you can say do not
suppress or hide it's recessive
counterpart love incomplete dominance
clearly states that when a dominant
allele or gene or a form of the gene
does not completely mask or hide the
effect of the recessive partner or
recessive allele and the organism
resulting shows a physical appearance or
blending of both on its pink rose as
after Lola
now in roses we all have seen the red
variety of rose and the wide variety of
always the red variety is the dominant
or the strongest one whether it is
homozygous dominant or heterozygous for
me that is the white variety whether it
is in homozygous condition or in
heterozygous condition is always
recessive or the weak part
so that heterozygous fruit juices are
formed after the mixing of the red rose
and the white rose which were pink in
color the basic experiment which cone
instead one of the disciplines of Gregor
Mendel was he basically crossed a red
flower string or a red flower with a
white flower stream now red was dominant
that everybody knew and what why it was
the recessive but what he also was the
law of incomplete dominance the law of
partial allowing another partner to grow
or to proceed its quality the f1 hybrid
swept pink in color and this pink in
color is an intermediate color when I
say intermediate it means somewhere in
the middle it is it is neither reddish
nor whitish in color now the law of
incomplete dominance not only governs
Mendel's pea plant it also governs
different human things in the terms of
your eye color in the terms of your hair
color your parents would have certain
colors of eyes for example black and
other parent will have certain color of
eye now you could have a combination of
both or just little different hair color
or you can see a skin color sometimes
show incomplete dominance in flowers any
intermediate color flower is a result of
incomplete dominance and this incomplete
dominance sucks as a process of serving
better variety in flora culture or just
producing better hydrent varieties
students in this part of the chapter
would did we study was about
non-mendelian inheritance or in simple
language you can say the law of
incomplete dominance I hope y'all are
clear about this law thank you
