This is the longest stage of the cell cycle. It used to be thought of as a period of rest.
What is interphase.
100
This phase of mitosis is usually the longest and may take up half the total time required to complete mitosis.
What is prophase?
100
These are a family of proteins discovered in the 1980's, that regulate the timing of the cell cycle.
What are cyclins?
100
These are two sets of chromosomes that correspond with each other. One was donated by the male and one by the female parent.
What are homologous chromosomes?
100
This is the production of genetically identical offspring from a single parent.
What is asexual reproduction
200
These are the phases of interphase characterized as periods of cell growth, DNA replication, and preparation for cell division.
What is G1, S, and G2 phases.
200
These make up the chromosome and are connected at the centromere.
What is sister chromatids?
200
These regulatory proteins respond to events occurring inside the cell. They will only allow the cycle to proceed if certain events have occurred in the cell itself.
What are internal regulators?
200
A cell that contains both sets of homologous chromosomes is said to be this.
What is diploid?
200
The parent of an asexually reproduced organism has 24 chromosomes in its cells. This is the number of chromosomes the offspring will receive.
What is 24?
300
This phase of the cell cycle is when the nucleus divides.
What is the M phase (Mitotic)
300
This attaches to the chromosomes at the centromere and is responsible for pulling the chromosomes apart during mitosis.
What is spindle fibers?
300
These are an important group of external regulatory proteins that stimulate the growth and division of cells.
What are growth factors?
300
Meiosis results in four daughter cells that are containing half the number of chromosomes as the body cells, so they are said to be this.
What is haploid?
300
This prevents cells from getting too large so that diffusion can happen more efficiently.
What is cell division?
400
This is the stage of the M phase when the nucleus divides.
What is mitosis?
400
These paired structures are in animal cells and not plant cells. They are what the spindle fibers come from.
What is centrioles?
400
This is a programmed cell death. It keeps the structures of tissues and organs developed properly.
What is apoptosis?
400
When these touch, crossing over of genetic information occurs.
What are tetrads?
400
If your body cells contain 24 chromosomes, this is how many chromosomes are in your gametes.
What is 12 chromosomes?
500
This is the stage of the M phase when the cell itself divides.
What is cytokinesis?
500
This is a phase of mitosis where the chromosomes are pulled apart.
What is anaphase?
500
This is a disorder in which the body cells lose the ability to control growth.
What is cancer?
500
During this phase of meiosis, paired homologous chromosomes line up across the center of the cell.
What is metaphase I?
500
This is the process of cell division in prokaryotic organisms.