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Genetics Unit 2012
dna mitosis meiosis cell cycle
65
Biology
10th Grade
10/19/2012

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Term
What phase of meiosis is shown in the attached diagram? [image]
Definition

Anaphase I

 

 

Term
What phase of meiosis is shown in the attached diagram?[image]
Definition
Anaphase II
Term
What phase of meiosis is shown in the attached diagram?[image]
Definition
Prophase I
Term
What phase of meiosis is shown in the attached diagram?[image]
Definition
Metaphase II
Term
What phase of is the cell in the diagram below in?[image]
Definition
Interphase
Term
What phase of meiosis is shown in the attached diagram?[image]
Definition
Telophase I
Term
What phase of meiosis is shown in the attached diagram?[image]
Definition
Telophase II
Term
Chromosomes
Definition
short, thick, twisted strand of DNA
Term
What term would you use to describe the chromosome number of the these cells that were just formed after Telophase II?[image]
Definition
Haploid
Term
Centromere
Definition
structure that holds sister chromatids together
Term
Chromatid
Definition
one chromosome of a pair, that is identical to the other in the pair
Term
Centriole
Definition
Structure found in the centrosome that helps with the spindle structure
Term
Spindle fiber
Definition
Structure that helps arrange and guide hte movement of chromosomes throughout mitosis or meiosis
Term
What events occur in Prophase?
Definition
1. Nuclear membrane dissolves 2. Chromosomes become visible 3. Spindle begins to appear
Term
What events occur in Metaphase?
Definition
1. Spindle fibers fully form 2. Chromosomes attach to spindle 3. Chromsomes move to center/middle of the cell
Term
What events occur during Anaphase?
Definition
1. Centromeres separate sister chromatids 2. Each chromatid begins to move to each pole 3. Identical copies are separated
Term
What events occur during Telophase?
Definition
1. Chromosomes gather at poles 2. Nuclear membrane begins to form 3. Cell membrane in animals begins to pinch / plant cells begin to make cell plate
Term
What are the three phases that make up Interphase?
Definition
G1, S, G2
Term
What occurs during Synthesis of Interphase?
Definition
DNA copies itself
Term
What events occur during G1 of Interphase?
Definition
1. Growth of the overall cell 2. Daily cellular functions
Term
Cytokinesis
Definition
Division of the cytoplasm and cellular organelles during cellular division
Term
Cytokinesis
Definition
Division of the cytoplasm and cellular organelles during cellular division
Term
Cell Cycle
Definition
Sequence of specific events from the formation of a cell through its reproduction
Term
Mitosis
Definition
Form of cellular division that produces 2, diploid, identical daughter cells
Term
Meiosis
Definition
Form of cellular division that produces 4, haploid, sex cells
Term
Haploid
Definition
term used to refer to a cell with 1/2 a complete set of chromosomes
Term
Diploid
Definition
Term used to refer to a cell with a complete set of chromosomes
Term
Tetrad
Definition
Structure formed by 4 sister chromatids/a homologous pair. This is where crossing over will occur if its going to happen.
Term
Crossing Over
Definition
When portions of homologous pairs exchange places. Contributes to genetic variation/recombination
Term
Name 3 purposes of mitosis:
Definition
1. Growth of overall organism (increase in cell numbers) 2. Maintain surface area to volume ratio of a cell 3. repair or replacement of injured/old/dead cells
Term
Name 1 purpose of meiosis:
Definition
To form haploid sex cells/gametes
Term
gamete
Definition
cells used in fertilization to complete sexual reproduction of an organism
Term
Where would meiosis occur?
Definition
Reproductive organs ONLY such as ovaries or testes
Term
Where would mitosis occur?
Definition
In any body tissue (muscle, bone, skin) EXCEPT reproductive organs
Term
What types of organisms use mitosis to reproduce the organism?
Definition
Unicellular or very simple organisms such as bacteria
Term
Sex Chromosomes
Definition
Chromosomes on the 23rd pair of a karyotype. The pair that determines the gender (male/female) of an organism
Term
Which process mitosis or meiosis will produce daughter cells identical to the parent cells?
Definition
mitosis
Term
Why is the first half of meiosis often called the reduction division?
Definition
Because it REDUCES the number of chromosomes by 1/2
Term
What is the correct order for the phases of mitosis?
Definition
Prophase, Metaphase, Anaphase, Telophase
Term
What would happen to the number of chromosomes in a species if mitosis was used to produce gametes?
Definition
The chromosome number would double every generation.
Term
How many chromosomes are found in one cell of a healthy human?
Definition
46
Term
Name two examples of gametes:
Definition
sperm, eggs, spores, pollen
Term
What two processes together result in sexual reproduction?
Definition
1. Meiosis = formation of gametes 2. Fertilization = combining of gametes
Term
If an organism's gamete contains 44 chromosomes, how many chromosomes would be in the skin of that species?
Definition
88
Term
Homologous Chromosomes (pairs)
Definition
Pairs made one from father and one from mother, similar in size, shape, location of centromere, but NOT identical. Both have info for eye color one may say brown, other say blue.
Term
Is there an interphase between Meiosis I and Meiosis II?
Definition
NO
Term
How many phases are in Meiosis? How many phases are in Mitosis?
Definition
Meiosis has 8 Mitosis has 4
Term
Deoxyribose
Definition
Sugar that is in the backbone of DNA
Term
nitrogen base
Definition
form the rungs of DNA or RNA, four in each molecule
Term
nucleotide
Definition
monomer that builds a protein, composed of nitrogen base, phosphate, and sugar
Term
phosphate
Definition
part of the backbone of DNA or RNA, does NOT connect to the sugar
Term
protein
Definition
product formed in ribosome, expresses genetics
Term
replication
Definition
process of creating identical strands of DNA
Term
ribose
Definition
sugar found in backbone of RNA
Term
sugar
Definition
part of the backbone in RNA or DNA, is attached to the nitrogen bases
Term

What is the molecule in the attached pic? 

How do you know?[image]

Definition

DNA, it is a double helix, RNA would only be single

Secondly, it has the nitrogen base T only found in DNA

Term
What are the structures in the attached pic?[image]
Definition
Nitrogen bases, specifically those found in DNA.  IF it was RNA, the T would be substituted with a U.
Term
[image]The arrows pointing up and down on the sides of the image below indicate what about the structure?
Definition
The arrows indicate that the DNA model is antiparallel.
Term

[image]

How many nucleotides are in the image above?

Definition
6
Term

Which part of a chromosome contains the genetic information?

A.  The proteins

B.  The DNA

Definition
B.  The DNA
Term
What is the name of the proteins that DNA wraps itself around when it is in chromosome form?
Definition
Histone
Term
What is a bacteriophage?
Definition
A virus that attacks bacteria.  It changes the DNA of the bacteria.
Term
What is the role of DNA polymerase in the replication process?
Definition
DNA polymerase unzips the DNA double helix so that it can go through the replication process.
Term
Why is the process of DNA replication considered semiconservative?
Definition
As DNA replicates, it creates an identical sequence of DNA however each double strand is made of one new strand as well as one of the original strands.
Term
Why does DNA replicate itself?
Definition
DNA is replicated so that when the cell replicates, an extra copy of the DNA/chromosomes is available for the new cell's nucleus.
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