Difficulty: Easy
Correct Answer: Nucleus
Explanation:
Introduction / Context:
Hereditary information in eukaryotes is stored mostly in the nuclear genome as DNA packaged into chromosomes. Recognizing the nucleus as the primary repository helps distinguish it from cytoplasmic organelles that have different roles.
Given Data / Assumptions:
Concept / Approach:
Inheritance is driven by chromosomal DNA housed in the nucleus. Chromosomal segregation during mitosis and meiosis ensures transmission of genetic material. While organellar DNA exists, nuclear DNA encodes the vast majority of genes governing development and physiology.
Step-by-Step Solution:
Verification / Alternative check:
Cytogenetic studies localize chromosomes to the nucleus; Mendelian inheritance patterns reflect nuclear chromosomal segregation.
Why Other Options Are Wrong:
Common Pitfalls:
Overstating the role of organellar genomes; forgetting that most genes are nuclear.
Final Answer:
Nucleus
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