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Can someone explain this picture for me?
http://images.flatworldknowledge.com/tye/tye-fig11...
I understand the ending part, but it's just the cell division part (meiosis??) that i don't understand. Like, for the dizygotic, why do the 2 eggs have the blue shading at the top versus the monozygotic that have the blue parts on the sides?
Thanks!
3 Answers
- 7 years ago
This appears to be fraternal twins vs identical twins. The dizygotic is fraternal and therefore has one blue shaded region per egg. The identical twin side has two blue shaded parts in one egg.
- 7 years ago
I believe for blue part is to tell you the number of fetus are going to form from that one zygote.
(second row) The left is only blue in one part because they are two separate zygotes (hence dizygotic) and each will form one fetus. On the right, that one zygote will form two fetuses.
(third row) This part shows that the dizygotic twins can have two separate placentas (A), or they can have just one (B) where the two zygotes come together. C and D just shows if they will share an amniotic sac or not.
