What are the differences in different types of twins?

Answer 1

Identical twins occur when a fertalized egg splits into two babies early in pregnancy. The babies will look exactly alike
Fraternal twins occur when the mother releases 2 eggs that are fertalized seperately. So it is like she got pregnant twice at the same time. The babies may resemble each other like ordinary siblings but won't look exactly alike.

Answer 2

Types of Twins
Identical or monozygotic twins are formed from one fertilized egg (one ovum and one sperm) which splits after conception into two identical halves which develop separately. Each identical child (always the same sex) will have the same chromosones and many of the same physical attributes. Identical twins will also share the same blood type, eye and hair color. According to research done by the National Organization of the Mothers of Twins Clubs, slightly more than half of all twins born are male and approximately one in four pairs of identical twins are mirror-image twins. About 1/3 of all twin births are identical.

Fraternal or dizygotic twins are formed from two fertilized eggs (two ovums and two sperms) and can result in two siblings of the same or opposite sexes. Your likelihood of having fraternal twins is dependent upon the woman carrying a fraternal twin gene and can also be affected by heredity, race, marital age and number of children previously borne. One-third of all twin births result in same sex fraternal twins and one-third are different sex fraternal twins.

And despite there being just the two types of twins, there is a growing scientific belief of a possible third type of twinning, Polar-Body Twinning. This type (although not fully accepted as an "official" type of twins by scientists yet) theorizes that twins aren't exactly identical and aren't exactly fraternal, but half identical/half fraternal. It can happen when the oocyte (primary egg cell) divides twice on its way to maturity, yielding egg cells and polar bodies at different stages along the way. Usually these smaller polar bodies don't play a meaningful role in reproduction. But now scientists believe that some twins could be the result of two of these egg cells and larger polar bodies being pregnated by two sperm. The twins would most likely share all of their mother's genes but only half of their father's genes.

Answer 3

same: initiate as one egg, one sperm, one embryo...early in the embryo's boom, the cells split and separate thoroughly, into 2 embryos that are genetically same. same twins regularly percentage a placenta and amniotic sac. Fraternal: a lady's body releases 2 eggs quickly, that are fertilized through 2 sperm. Separate placentas and sacs, no extra similar than the different siblings. Parasitic/conjoined: began in same way as same twins, besides the undeniable fact that both embryos did not separate thoroughly. Eww. Chimeras: "Chimera twins are very uncommon, brought about by the fusion of two separate embryos early in progression." quote from the source less than

Answer 4

Identical twins are from 1 fertilized egg that has split, and fraternal twins are 2 eggs that have been fertilized.

Answer 5

Identical twins - one egg is fertilized by one sperm and splits in two; the twins look exactly alike...can only be boy/boy or girl/girl

Fraternal twins - two eggs are fertilized by two different sperm; the twins look similiar but not exactly alike...can be boy/boy, girl/girl, or boy/girl

Answer 6

there are paternal and faternal one is identical and one is possible different sexes or they just dont look anything alike i can never tell which one is which but im sure if u type in twins on any search engine it will tell u

Answer 7

Fraternal - come from two different eggs. Usually they don't look all that similar.
Identical - come from the same egg that splits. They usually look almost, well, identical.

Answer 8

Identicle= looks the same
Ferternal= dont look the same, but they still resemble eachother kinda.

Answer 9

the one that share the same sack and the ones that dont