Why do identical twins have the same set of genes?

A.) they are born of the same parents
B.) one or more gametes underwent nondisjunction
C.) they were born of one fertilized ovum
D.) they both have haploid chromosomes

Question

Why do identical twins have the same set of genes?


A.) they are born of the same parents
B.) one or more gametes underwent nondisjunction
C.) they were born of one fertilized ovum
D.) they both have haploid chromosomes

anonymous · Answer

Identical twins occur when an egg is fertilized, undergoes cell division, and for whatever reason the cells that are produced during cell division separate from one another.  The cells will be genetically identical and develop into two separate organisms that are also genetically identical.

So the answer is C: they were born of one fertilized ovum.

anonymous · Answer

THANK YOU FOR THE EXPLANATION. REALLY NEEDED THAT.