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Multiple Choice
A zygote that separates into two clusters of cells instead of just one produces:
A
triplets
B
fraternal twins (dizygotic twins)
C
identical twins (monozygotic twins)
D
a single offspring with genetic variation
Verified step by step guidance
1
Understand the concept of a zygote: A zygote is the single-celled organism formed by the fusion of a sperm and an egg during fertilization. It contains the genetic material from both parents and is the starting point for the development of an organism.
Learn about identical twins (monozygotic twins): Identical twins are formed when a single zygote splits into two separate clusters of cells during early development. These two clusters develop into two individuals with identical genetic material because they originated from the same zygote.
Differentiate identical twins from fraternal twins: Fraternal twins (dizygotic twins) occur when two separate eggs are fertilized by two different sperm, resulting in two genetically unique individuals. This is different from the splitting of a single zygote, which produces identical twins.
Recognize the process of zygote splitting: The splitting of a zygote into two clusters of cells is a rare event and leads to the formation of identical twins. This process does not produce triplets or a single offspring with genetic variation.
Conclude that the correct answer is identical twins (monozygotic twins): When a zygote separates into two clusters of cells, it results in the formation of identical twins, as both clusters share the same genetic material from the original zygote.