IB Biology Cell Division

Cell division results in

• genetically non identical cells

• genetically identical cells

• none of the above

Eukaryotic chromomes are made up of

• centromeres

• chromatin

• chromatids

• centrioles

Each single chromosome contains one very lone, linear DNA molecule that carries several hundred to a few thousand

• genes

• chromosomes

• genomes

• phenotype

When a cell is not dividing, and even as it duplicates the DNA in preparation for cell division, each chromosome is in the form a of along thin __________________fiber

• chromosome

• sister chromatid

• chromatin

After DNA duplication, the chromosomes ______________: each chromatin fiber becomes densely coiled and folded making chromosomes smaller and shorter

• decondensed

• duplicates

• condensed

• disappear

Each duplicated chromosome has two ____________________________ each containing identical DNA molecules

• daughter cells

• sister chromatids

• homologous chromosomes

In its condensed form, the duplicated chromosome has a narrow 'waist' at a specialized region called the ______________________ where the two sister chromatids are most closely attached

• centrioles

• cytokinesis

• centromere

Later in cell division, the two sister chromatids of each duplicated chromosome separate and move into two new ____________________

• nuclei

• cytoplasms

• they don't move

Once the sister chromatids separate they are considered to be individual

• chromatids

• chromosomes

• centromeres

• DNA

Mitosis is the division of the _____________cytokinesis is the division of the ________________

• cytoplasm, nucleus

• cytoplasm, DNA

• DNA, nucleus

• nucleus, cytoplasm