A geneticist is studying a plant species with a known nondisjunction event during meiosis I. What chromosomal pattern should they expect in the resulting gametes?

• A. All gametes will lack one chromosome.
• B. All gametes will have the correct number of chromosomes.
• C. All gametes will have an extra chromosome.
• D. Half of the gametes will have an extra chromosome, and half will lack one.

Answer: (D)