Vocab.
The period in which a cell is formed up until dividing
What is The Cell Cycle?
Which phase lasts longer during the cell cycle, the Mitotic Phase or Interphase?
*Which phase comes 1st?*
Interphase
*Interphase*
What types of cells perform Binary Fission?
*Explain the difference between Mitosis and Meiosis*
Prokaryotic cells
*Mitosis creates genetically identical cells.*
*Meiosis creates nonidentical cells due to the 'semi-conservative' nature of sperm and egg*
Is the DNA condensed into chromosome form during Interphase or Mitosis?
*what about Telophase/Cytokinesis?*
Mitosis
*Uncondensed after Telophase*
What is one cool example she gave us where stem cells are being used to grow things in labs?
ground beef and entire organs for transplants!
The type of cells that divide
What are Stem Cells?
What happens during the Mitotic Phase?
The Cell divides (mitosis)!
What stage comes after G2?
Mitotic Phase!!!
Des. the significance of Sea Urchins regarding this lecture
Their embryos divide in the water (outside the mother's body) making it easy to observe. The process is almost identical in humans.
The 2 DNA molecules are attached in the middle of a chromosome. This location is known as the _______.
Centromere!
*because it is in the center*
Division of the cytoplasm and all of its contents
What is Cytokinesis?
List the 3 steps that are part of Interphase
G1, S, G2
This is the phase of Interphase where DNA Replication (Synthesis) occurs
What is the S phase?
Explain the difference in the way Prof. Lum counts chromosomes vs. the textbook
*what do we call the 2 paired chromosomes that are attached together?*
Prof. Lum counts the chromosomes
The textbook counts the centromeres
*Sister Chromatids*
A sperm cell that has linked up with an egg cell is called a ______.
What is a Zygote?
Division of the nucleus and all of its contents
What is Mitosis?
This phase is the first time the cell is "getting ready" to divide. Most of the products being produced at this time help with DNA replication (synthesis).
G1 (Gap/Growth Phase)
The phase of Interphase where the cell "grows further". The cell doubles nearly everything it has.
G2 Phase
*Getting-Ready 2 Phase*
During Cytokinesis...
What type of cells make a 'cleavage furrow' and what type of cells make a 'cell plate'?
Animal Cells make 'cleavage furrows'
Plant Cells make 'cell plates', so do prokaryotes
After sperm meets egg, what type of stem cells would be dividing? (the ones that can divide into anything)
*Why do some people frown upon 'cultured embryonic stem cell' research?*
Pluripotent Stem Cells
*that is a potential human life you're experimenting with!*
The uncondensed form of DNA
*unrolling the ball of yarn*
Chromatin (form)
List the 5 phases that make up Mitosis (in a Euk. cell)
Prophase, Prometaphase, Metaphase, Anaphase, Telophase
*pee-pee mat*
What 2 phases is the Mitotic Phase subdivided into?
Mitosis and Cytokinesis
List 3 "Purposes for Cell Division"
1. Reproduction (of entire organism)
2. Growth and Development
3. Tissue Renewal
List the 3 types of Cell Division
1. Mitosis
2. Meiosis
3. Binary Fission