Introduction to reproduction
arproduction
INTRADUCTION
zoology
biologicalprocess in which new offsprings are produced from the parent s
is called as reproduction
ASEXUAL SEXUAL
Progeny from a Involves twoparents
single parent i e requires fusion
of the male q the
individuals are female gametethus calledasdizygotictwins sincetwodifferent
genetically a forming a zygote eggsarefertilizedseparatelybytwosperms thus
morphologically formingtwozygotes
identical to the 4Hence separateplacenta
parent as well as geneticallydistinct
separateamnioticsacs
one another genetically different
clones
from each other as
Thus the progeny well as the parents 1 Mm
are also called as Genderpossibilities 661BBGBBo
alsocalledanidenticaldizygotic fraternaltwins
ConjoinedTwins MONOZYGOTICTWINShave different
blood groups Theyarethetwinswhoarebornphysically Theconditionherestartsnormally one
connected toeachother zygoteisformedafterthefusionof 1sperm
Yes andaegg Thereafter thezygotesplitsinto
twocells whicharelike azygoteeachonereason behindthisisthat whenthe
sinceonly a zygoteisinitiallyformedafter
d
socenticaltwinscaseis inactionthezygote
bloodgroupsmayfallin failstosplitcompletelyandthepartwhich
thefusionofaegganda sperm theyareboththe categories but calledas monozygotictwins
thetwinshavingdifferent ayyy.thusthetwinssharesomepartsofthier ehence sharedplacenta maynot
bloodgroupsfall inthe separateamnioticsacs
categoryoffraternal Geneticallyidentical
twins samegender
BB I Go89 8 Alsocalledas Identical twins
Embryonic Development Ilja D Dility
Q what are themajorfeatures of the fusion zygotesplits
embryonicdevelopment at various