Place the following terms in order of size, fromsmallest to largest: chromosome, genome, gene,nucleus.

To order the terms chromosome, genome, gene, and nucleus from smallest to largest, we first need to define each term briefly:

1. Gene: A segment of DNA that contains the instructions for building a specific protein or set of proteins. Genes are considered the smallest units of heredity.

2. Chromosome: A structure within cells that contains DNA and protein. In humans, each cell typically contains 23 pairs of chromosomes, which are made up of many genes.

3. Nucleus: The membrane-bound organelle in eukaryotic cells that contains the chromosomes and thus the genetic material of the organism. The nucleus is larger than a single chromosome, as it houses multiple chromosomes.

4. Genome: The complete set of an organism’s DNA, including all of its genes and non-coding sequences. The genome encompasses all the genetic material within the nucleus.

Final Order from Smallest to Largest:

1. Gene
2. Chromosome
3. Nucleus
4. Genome

In summary, the hierarchy in terms of size is gene < chromosome < nucleus < genome. This arrangement helps clarify the organization of genetic material within biological systems.