POST FERTILIZATION Video Lecture - Class 10

post fertilization events the events in
sexual reproduction after the formation
of zygote are called post fertilization
events zygote is the vital link that
ensures continuity of species between
organisms of one generation and next
every sexually reproducing organism
including human beings begins life as a
single cell the zygote formation of the
diploid zygote is universal in all
sexually reproducing organisms in
organisms with external fertilization
zygote is formed in the external medium
usually water whereas in those
exhibiting internal fertilization zygote
is formed inside the body of the
organism further development of the
zygote depends on the type of life cycle
the organism has and the environment it
is exposed to in platyhelminthes tinier
solium life cycle is complicated
involves one or more hosts cross
fertilization in trauma toads and
self-fertilization incest toads is very
common in organisms belonging to fungi
and algae zygote develops a thick wall
that is resistant to desiccation and
damage it undergoes a period of rest
before germination zygote divides by
meiosis form haploid spores that grow
into haploid individuals zygote is a
vital link that ensures continuity of
species between organisms of one
generation and the next
every sexually reproducing organism
including human beings begin life as a
single cell the zygote embryogenesis the
process of development of embryo from
the zygote is known as embryogenesis
zài goat undergoes cell division mitosis
and cell differentiation cell division
increases the number of cells in the
developing embryo
whereas cell differentiation helps
groups of cells to undergo certain
modification to form specialized tissues
and organs to form organism animals are
categorized into a vaporous and little
Perez based on whether the development
of the zygote take place outside the
body of the female parent or inside that
is whether the less fertilized or
unfertilized eggs or give birth to young
ones proto Tyrians are primitive reptile
like mammals without nipples corpus
callosum and Pina distributed in
Australia and New Guinea you Syria
includes numerous mammals met atheria
includes possible mammals the embryos
are born very young Australia is the
land of marsupials young ones are born
in relatively advanced state in visitors
animals majority of mammals including
human beings
the zygote develops into a young one
inside the body of the female organism
in a vaporous animals like reptiles and
birds the fertilized eggs covered by
hard calcareous shell are laid in a safe
place in the environment in flowering
plants the zygote is formed inside the
ER view after fertilization the sepals
petals and stamens of the flower wither
and fall off the zygote develops into
the embryo and the ovules develop into
the seed the ovary develops into the
fruit which develops a thick wall called
pericarp that is protective in function
after dispersal seeds germinate under
favourable conditions to produce new
plants let us see a few kinds of fruits
showing seed and protective Perekop