Final answer:
True statements about genes include that all cells in a multicellular organism contain the same set of genes, genes are composed of DNA, and gene variations are caused by mutations.
Step-by-step explanation:
Regarding genes, the following statements are true:
- All cells in a multicellular organism contain the same set of genes.
- Genes are made up of DNA.
- Variations in genes are the result of mutations.
Each nucleated cell in a multicellular organism contains a complete set of DNA, which means that they have the same genes. However, different cell types express different subsets of these genes. The result is the varied cell functions and characteristics we observe, although the genetic content remains the same. This is due to gene regulation and expression, which leads to cell differentiation in multicellular organisms. Humans indeed inherit DNA from both their mother and father, which allows for genetic diversity and complexity in the offspring. Finally, not all organisms, such as roses, elephants, and mushrooms, have the same set of genes; instead, they have different genes that contribute to their unique characteristics and capabilities.