Martin and Matthew Are Identical Twins

question 1

Multiple Choice

Martin and Matthew are identical twins. Matthew has obsessive-compulsive disorder, but Martin does not. In a biological research study, who would be the proband?

• A) Martin
• B) Matthew
• C) Martin and Matthew's mother
• D) Martin and Matthew's older sister

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Definitions:

Cell Cycle

The series of events that take place in a cell leading to its division and duplication, including interphase and mitotic phase.

Sequence

An ordered list or arrangement of objects or events that follow a specific pattern or order.

Apoptosis

Programmed cell death, an essential process for maintaining the health and development of an organism.

Proto-oncogene

A normal gene that can become an oncogene due to mutations or increased expression, potentially leading to cancer.