The Cell C
Cycle in Yourr Body •
the _
___________
_____ _____
___________
_is responsibble for the _________________and development of aall your bodyy cells •
we alll started out as a _____
___________
_cell, but thrrough the prrocess of _________________, we haave became a living ___
___________
___composeed of hundreeds of _________________of cells working together Reggeneration
•
Cut _
___________
_____– usuaally heal in sh
hort amountt of time •
_____
__________
__breaks – taake longer •
This is because of mitosis – capable of re
epairing injurred ________________ •
_____
__________
__of injured cells or makking of lost bbody parts = ________________ Aging •
Agingg – we age b
because as ce
ells _______
_________, eeither they aare not replaaced or replaaced _____
__________
__ •
Results in change
e of _______
_________and ________________off major bodyy systems •
Skin _
__________
______, bone
es lose ____
_____________, immune system is _________________ -Sexual reproduction is reproduction that includes _______ - a _______ requires imput from another.
- The result is _______, not identical to __________.
- Before ________ reproduction can take place, _____ ________ must be
created.
- _________ is the process which produces sex cells.
Before we can look at the stages of meiosis, we must first understand
what a few words mean...
- The end product of meiosis is sex cells with ______ the amount
of ____________ that was present in each ______.
- This state is called ___________.
- At the beginning of __________, cells have a complete set of information
(e.g. 2X5 = 10)
- We call it __________ or ____.
- Through meiosis, you create a ______ - 5
- We call it __________ or _____.
- Diploid = ____________
- Haploid = ________
Another new word...
-You have ____ __________ in your body cells.
-If you were to study these chromosomes through a microscope, you would
discover that your 46 chromosomes could be arranged into ____ _____ that
resemble each other in _______ and _______.
-These "_________" pairs of chromosomes are called ___________
_______.
- During meiosis, homologous pairs of chromosomes ______ _____ before
__________ takes place.
Stages of Meiosis
Meiosis is a process that produces ______ ____ _______, from _____
cells. In order to do this, there must be _____ ______ of chromosomes.
Let's take a look at this process...
Interphase:
Prophase I:
Metaphase I:
- Chromosomes are ________
- Chromosomes appear as _______ coils
(_______) at the start, but each chromatin, and
its copy begin ________ in order to become
visible as individual chromosomes by the end of
this phase.
- _______ (poles) appear and begin to move to
_________ ends of the cell
- ________________ _____________ pair up
- __________ ____________ begins to break
down
-
_____________ chromosomes line up along
the ________ of the cell
-
homologous chromosomes ________ and begin
to move to __________ ends of the cell
Anaphase I:
Telophase I:
- _______ new _________ form
- cell ________ _______ inward to create two
___________ cells that have their own
___________ and _______ the number of
chromosomes (two cells are now __________, but
chromosomes are still in _________.)
Stages of Meiosis
-Meiosis II is essentially the same as __________. The important
difference is that meiosis II starts with a __________ cell.
-Also, at the end of meiosis II, you end up with _____ _______ _______
cells.
-So, the end result of meiosis is ___ ________ cells, and the end result of
mitosis is _____ _________ cells.