What form of reproduction does genetic variation fall under?
Sexual Reproduction
100
What is the Chromatin number in a parent cell before division begins in Mitosis and Meiosis I and II?
92
200
The cell grows in this phase
G1
200
What are the two steps that occur at the beginning of Prophase?
Nucleoli disappears and the chromatin condenses into chromosomes.
200
if a cell has 46 chromosomes at the beginning of meiosis, then at anaphase I there would be a total of
46 chromosomes
200
During this phase, nonsister chromatids of homologous chromosomes exchange pieces of genetic material.
Prophase I
200
What is the purpose of division in Mitosis and Meiosis?
Mitosis: Cell replacement, organism growth, and asexual reproduction.
Meiosis: Sexual reproduction
300
What is the difference between the S phase and the G1 phase?
Besides growth, the S phase duplicates the DNA.
300
The mitotic spindle is assembled during what phase?
Prophase
300
Corresponding regions along sister chromatids that form close associations.
What is Chiasmata
300
independent assortment of homologues occurs in what stage of meiosis?
Metaphase I
300
Mitosis occurs in what kind of cells?
Somatic
400
Growth and preparation for cell division occurs in this phase.
G2
400
What are microfilaments role in Mitosis?
They act like purse strings to pull the plasma membrane into the center, diving the cell into two daughter cells. (Occurs during Cytokineses)
400
True or False. Chiasmata and crossing over occurs during both Prophase I and Prophase II. Explain Why
False. Crossing over only needs to happen once in order for genetic material to be exchanged.
400
what are the three factors that contribute to genetic variation?
What is crossing over, independent assortment of homologues, and random joining of gametes.
400
Crossing over does not occur in what processes?
Mitosis and Meiosis II
500
Interphase occurs in these stages
G1, S, and G2
500
A plant forms a cell plate in order for cytokineses to occur.what does the cell plate subsequently become?
The plasma membrane for the two daughter cells.
500
Discuss the importance of crossing-over and independent assortment
crossing- over is needed to exchange genetic material between sister chromatids. independent assortment is the random arrangement and separation of chromosomes.
500
In mitosis, every daughter cell is exactly like the parent. Meiosis and sexual reproduction, however, result in a reassortment of the genetic material. What is this reassortment called?
What is Genetic Recombination
500
In mitosis, chromosomes line up on the Metaphase plate. How do chromosomes line up during Meiosis I and Meiosis II?
Homologues pairs line up during Metaphase I. Chromosomes line up during Metaphase II.