Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
WWhat is chromosome?
|
The physical sturcture in a cell that contains the cell's gentic material
|
|
|
What is a centromere?
|
The most thickened and thin region of a chromosome, to which the spindle fiber is attached during mitosis, little ball in the middle of the chromosome
|
|
|
What is chromatid?
|
2 strands on the side of the chromosome that are joined by a single centromere and separate during cell division to become individual chromosomes
|
|
|
What is DNA?
|
The genetic materialk fouind in all living cells that contains the information needed for an organism to grow, maintain itself and itself. Deoxyribonnucleic acid.
|
|
|
What is centrioles?
|
One of two round cellular structures that are composed of nine triplet microtubules and form the asters during mitosis.
|
|
|
What is spindle fibers?
|
One of a network of colorless filaments that extend inward from the poles of a dividing cell, forming a spindle-shaped figure.
|
|
|
What is cytokinesis?
|
is the division of the parent cell's cytoplasm
|
|
|
What is mitosis?
|
part of the cell cycle during with nucleus divides
|
|
|
Wha tis the 1st phase of mitosis and what does it do?
|
Interphases-when the cells DNA is copied
|
|
|
What is the 2nd stage of mitosis and what does it do?
|
Prophase-chromosomes condense, the nulclear membrane disappears and long stands of DNA condense to distinct chromosomes, each with 2 chromatids that are exact copies of eachother
|
|
|
What is the 3rd stage of mitosis and what does it do?
|
Metaphase- chromosomes line up in the middle of the cell
|
|
|
What is the 4th stage of mitosis and what does it do?
|
Anaphase-Chromtids of each chromosome split into 2 separtate chromosomes, and the separtate chromatids are pulled to opposite ends of the cell
|
|
|
What is the 5th stage of mitosis and what does it do?
|
Telophase-a new nuclear membrane forms around each of the chromosomes during telophase, then the chromosomes return to thread like form
|
|
|
What is the 6th stage of mitosis and what does it do?
|
cytokinesis-The division of the cytoplasm of a cell following the division of the nucleus.
|
|
|
What are the chromosomes located in?
|
In the nucleus of a cell
|
|
|
What is the longest phase?
|
prophase
|
|
|
What is prokaryotes and how is connected to mitosis?
|
prokaryotes is a that lacks a nucleus and other organelles, with DNA that is not oragized into chromosomes and it is not connected mitosis a tall b.c it lacks a nucleus
|
|
|
What is eukaryotes and how is it conected to mitosis?
|
Eukaryotes is a cell in which the genetic material is enclosed within a nucleus, surrounded by a memebrane, its connected with mitosis b.c mitosis takes place in eukaryotes b.c it has a nucleus
|
|
|
How many chromosomes do humans have?
|
46 chromosomes
|
|
|
When do cells begin to specialize?
|
Cells begin to specialize during development of a cell.
|
|
|
Why is cell division important?
|
Cell division is important because if a cell didnt divid then it would die
|
