When Would Monozygotic (Identical) Twins Be Produced

question 39

Multiple Choice

When would monozygotic (identical) twins be produced?

• A) One sperm fertilizes two different eggs.
• B) One egg is fertilized by two different sperm.
• C) One embryo splits into two embryos.
• D) Two different sperm fertilize two different eggs.

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Definitions:

Referential Integrity

In a relational database, a condition where, for each value in the foreign key table, there’s a corresponding value in the primary key table.

Foreign Key

In a relational database, the common field between tables that’s not the primary key.

Primary Key

A unique identifier for each record in a database table, used to ensure data integrity.

Default Value

The value a database automatically uses for a field unless the user enters another value.