Dizygotic (Fraternal) Twins Result from

question 80

Multiple Choice

Dizygotic (fraternal) twins result from

• A) fertilization of two secondary oocytes by two different sperm
• B) fertilization of one secondary oocyte by two sperm
• C) early splitting of a zygote to produce two individuals
• D) none of these choices

---

Definitions:

Vaccine

A biological preparation that provides active acquired immunity to a particular infectious disease.

First Stage

Often refers to the initial phase of a multi-phase process, such as the first stage of development or the first stage in a sequence of events.

Labor

The physical and mental effort used in the process of production, or the act of giving birth.

Rh Incompatibility

Rh incompatibility is a condition that occurs during pregnancy if a mother's Rh blood type is negative and her fetus's Rh blood type is positive, potentially leading to hemolytic disease of the newborn.