Formation and Variation in Identical Twins
Published:
28. (Open-ended question; 3 points) Explain how identical twins are formed during reproduction. Explain why identical twins can start to look different later in their lifetime. Include a specific example in your answer.
Animated Video Solution
The first half plays free, the full solution is in the app.
Step by Step Written Solution
Hi Jaylah, let's explore the biology behind how identical twins form and why they might start looking different over time.
Formation and Variation of Identical Twins
Identical twins, also known as monozygotic twins, begin their journey from a single fertilization event.
1. Formation during Reproduction
This single egg is fertilized by a single sperm cell to form a zygote. This means both twins start with the exact same genetic blueprint.
Very early in development, this single fertilized egg splits into two separate embryos. Each embryo then develops into a baby.
Even though they share the same DNA, identical twins can start to look different as they get older. This is because of environmental influences and epigenetics.
2. Why they look different later
Key Factors:
* Environment: Lifestyle choices, diet, and habits.
* Epigenetics: Chemical changes that affect how genes are expressed without changing the DNA sequence.
The rest of this solution is on Solvi
4 more steps are locked. Watch the full animated, narrated solution for free.
Snap a photo, solve any question like this.
Watch the Rest for Free
Free to download · First solutions are on us
