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24 Cards in this Set

  • Front
  • Back

Between cell divisions, DNA is long and stringy and exists as

chromatin

DNA makes a _______ of itself before cell division.

copy

In eukaryotes, the DNA wraps around proteins to make a compact


structure called a

chromosome

The two copies of DNA make up the two identical halves of


chromosomes. Each half is called a

sister chromatid

The two chromatids are attached at a point called a

centromere.

When the cell divides, each of the two new cells will receive one


chromatid from each

chromosome

Humans have ___ pairs of chromosomes for a total of ___ chromosomes IN EACH CELL’S NUCLEUS.

23, 46

___________ ___________is the process by which cells reproduce.

Cell Division

__________ __________is the process of cell division in prokaryotes.

Binary fission

__________ is the process of cell division in eukaryotes.

Mitosis

Mitosis results in 2 new cells with genetic material that is _________


to the genetic material of the original cell.

identical

Mitosis occurs in organisms undergoing ________, _____________,


__________, or ______________.

growth, development,


repair,


asexual reproduction

__________ reproduction is the production of offspring from one


parent.

Asexual

One example of asexual reproduction is __________ ____________seen in bacteria.

binary fission

16.The _______ ________ is the repeating set of events in the life of a cell.

cell cycle

The time between cell division is called ________________.

interphase

__________ consists of three phases:


a)._________ of the cell


b). _____________ of the DNA (synthesis)

Interphase, growth, replication

Mitosis is the division of the __________, which occurs during cell division.

nucleus

Mitosis is divided into stages: ____________, ____________, _____________, ______________.

prophase, metaphase, anaphase, telophase.

Mitosis results in ___ daughter cells that are genetically identical to the original cell.

2

____________ is the first phase of mitosis.


a) Chromatin condenses to form chromosomes.
b) The nucleolus and the nuclear membrane break down and


disappear.
c) In animal cells, cylindrical bodies called centrioles appear which


produce spindle fibers.

Prophase, chromosomes, disappear, spindle fibers.

____________ is the 2nd phase of mitosis.
a) Spindle fibers attach to the _____________ of the chromosomes and


move them to the center of the dividing cell.

Metaphase, centromere

The third step of mitosis is______________.
a) The chromatids of each chromosome separate at the centromere


and slowly move toward the ___________ poles of the dividing cell.

Anaphase, Oppisite

The fourth step of mitosis is ___________.
a) The spindle fibers disassemble
b) the chromosomes return to a less tightly coiled ____________ state. c) A ___________ envelope forms around each set of chromosomes, and a


nucleolus forms in each of the newly forming cells.

telophase, chromatin, nuclear