Mitosis/Meiosis CTQ Flashcards
confirmed test questions
Define cancer
the uncontrolled growth and division of cells; unregulated cell growth
What causes cancer?
mutations in the segments of DNA that control the production of proteins, including proteins that regulate the cell cycle.
what are the proteins that regulate the cell cycle?
CDK (Cyclin-Dependant Kinase)
Interphase definition
Interphase is the longest part of the cell cycle. This is when the cell grows and copies its DNA before moving into mitosis
Prophase definition
Prophase is the first phase of the mitosis. During the prophase stage, the chromosomes condense into an X-shaped structure. spindle forms and nucleus disappears
Metaphase definition
Metaphase is a stage in which the cell’s chromosomes condense and move to the center of the cell
Anaphase definition
In anaphase, the sister chromatids separate from each other and are pulled towards opposite ends of the cell. Chromatids move to opposite poles
Telophase definition
In telophase, the mitotic spindle is broken down. Two new nuclei form, chromosomes decondense
what is crossing over
when segments of one chromosome is exchanged with segments of its homologous chromosome.
what are Gametes
Sex cells such as sperm and egg cells
do eukaryotes have a nucleus
yes
do prokaryotes have a nucleus
no
why can’t prokaryotes do mitosis
no nucleus
what happens during binary fission
prokaryotic DNA is copied both copies attach to the plasma membrane. As the plasma membrane grows the attached DNA molecules are pulled apart
what process do eukaryotic cells go through
can go through mitosis or meiosis
