An ova fertilized by one sperm that divides into two zygotes results in what type of gestation?

An ova fertilized by one sperm that divides into two zygotes results in what type of gestation?

• A. Monozygotic gestation
• B. Dizygotic gestation
• C. Multiple gestation
• D. Single gestation

Answer: (A)

When an ova, or egg, is fertilized by a single sperm and subsequently divides into two zygotes, this process results in monozygotic gestation. This type of gestation occurs when a single fertilized egg, or zygote, undergoes cleavage and splits into two embryos, leading to the development of identical twins. These twins share the same genetic material since they originate from the same fertilized egg. In contrast, dizygotic gestation involves two separate eggs being fertilized by two different sperm, resulting in fraternal twins who are genetically distinct. Multiple gestation refers to any pregnancy with more than one fetus, which could encompass both monozygotic and dizygotic scenarios. Single gestation indicates a pregnancy with only one fetus. In summary, monozygotic gestation is specifically characterized by the formation of identical twins from one fertilized egg, clarifying why this answer is the correct choice.

When an ova, or egg, is fertilized by a single sperm and subsequently divides into two zygotes, this process results in monozygotic gestation. This type of gestation occurs when a single fertilized egg, or zygote, undergoes cleavage and splits into two embryos, leading to the development of identical twins. These twins share the same genetic material since they originate from the same fertilized egg.

In contrast, dizygotic gestation involves two separate eggs being fertilized by two different sperm, resulting in fraternal twins who are genetically distinct. Multiple gestation refers to any pregnancy with more than one fetus, which could encompass both monozygotic and dizygotic scenarios. Single gestation indicates a pregnancy with only one fetus. In summary, monozygotic gestation is specifically characterized by the formation of identical twins from one fertilized egg, clarifying why this answer is the correct choice.