questions 1

Monozygotic vs. Dizygotic Twins

Author:
Topic updated on 11/27/16 5:12am

 
 
Monozygotic Twins
  • Monozygotic (identical) twins
    • one oocyte fertilized by one sperm (twins genetically identical)
    • zygote forms a blastocyst in which the inner cell mass divides into two
    • 2 different amniotic sacs but share common chorion and placenta
  • Conjoined twins
    • one oocyte fertilized by one sperm (twins identical and joined by tissue bridge)
    • formed similar to monozygotic twins but inner cell mass splits in two incompletely
    • 1 amniotic sac, 1 chorion, 1 placenta
Dizygotic Twins
  • Fraternal twins 
    • two oocytes each fertilized by different sperm (twins genetically different)
      • no more identical than two siblings born at different times
    • 2 amniotic sacs, 2 chorions, 2 placentas


  RATE CONTENT
2.0
AVERAGE 2.0 of 5 RATINGS

Qbank (0 Questions)

This is a Never-Been-Seen Question that can only be seen in Study Plan Mock Exams.
Access to 600+ Questions not available in Free Qbank


Recent Videos

video
good video on monozygotic and dizygotic twins
4/6/2016
167 views
0

Evidence & References Show References




Topic Comments

Subscribe status: