Which organelle stores the genetic information that determines an individual's blood type?

• A. Mitochondrion
• B. Nucleus
• C. Endoplasmic reticulum
• D. Golgi apparatus

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the role of genetic information in determining traits such as blood type. Genetic information is stored in the form of DNA, which contains the instructions for producing proteins and other molecules that influence traits.
2. Step 2: Recall the function of the nucleus in a eukaryotic cell. The nucleus is the organelle responsible for storing and protecting the cell's genetic material (DNA). It acts as the control center for cellular activities.
3. Step 3: Compare the functions of the other organelles listed in the problem. The mitochondrion is involved in energy production, the endoplasmic reticulum is responsible for protein and lipid synthesis, and the Golgi apparatus modifies, sorts, and packages proteins. None of these organelles store genetic information.
4. Step 4: Recognize that the nucleus is the correct answer because it is the only organelle that stores DNA, which determines traits such as blood type.
5. Step 5: Conclude that the nucleus is the organelle responsible for storing the genetic information that determines an individual's blood type.