9Q Sex determination in many organisms is an example of what?
1. The dominance of Y chromosomes over X chromosomes.
2. Sex linkage
3. Nondisjunction
4. Chromosomal interactions
5. None of the above
CORRECT! Sex determination is the result of a balance among genes. True, by extension it might be an example of chromosomal interactions but the chromosomes are essentially molecular racks into which the genes are placed. Ultimately, the phenotypic effect is the result of gene interaction.