Lecture 13: Eukaryotic Cell Division: Mitosis Flashcards
What is a karyotype?
An ordered, visual representation of the
chromosomes in a cell.
What are the phases of cell cycle?
Mitotic (M) Phase which includes cytokinesis and mitosis
Interphase which includes G1 S and G2
What is G1 Phase?
Metabolic Activity & growth
What is the S phase?
Metabolic activity, growth and DNA synthesis
What is G2 phase?
Metabolic activity growth and preparation for cell division
duplicated chromosome is?
two sister chromatids which later separate (during mitosis)
What is mitosis? What is the 5 stages of mitosis?
Produces two genetically identical daughter cells
Consists of five phases: Prophase Pro metaphase Metaphase Anaphase Telophase
What happens in prophase?
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.
What happens in prometaphase?
Prometaphase is the second phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prometaphase, the physical barrier that encloses the nucleus, called the nuclear envelope, breaks down.
What happens in metaphase?
Metaphase is a stage during the process of cell division (mitosis or meiosis). Normally, individual chromosomes are spread out in the cell nucleus. During metaphase, the nucleus dissolves and the cell’s chromosomes condense and move together, aligning in the centre of the dividing cell.
What happens in anaphase?
Anaphase is the fourth phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.
What happens during telophase & cytokinesis
Telophase refers to the final step of nuclear division, which follows anaphase, in which two daughter nuclei are formed through the formation of nuclear membranes. Meanwhile, cytokinesis refers to the cytoplasmic division of the cell either at the end of the mitosis or meiosis, separating two daughter cells
What do sister chromatids do during anaphase?
Sister chromatids separate during anaphase
Each daughter cell has one copy of every chromosome
Sister chromatids in mitosis each have:
A) 2 single-stranded copies of their DNA molecule.
B) 2 double-stranded copies of their DNA molecule.
C) 1 single-stranded copy of their DNA molecule.
D) 1 double-stranded copy of their DNA molecule.
D) 1 double stranded copy of their DNA molecule
During mitotic anaphase:
A) the daughter chromosomes move to opposite ends
of the cell.
B) the non-kinetochore microtubules shorten.
C) the kinetochore microtubules lengthen.
D) all of the above
A) the daughter chromosomes move to opposite ends of the cell
