Chapter 3 Flashcards
Secondary spermatocyte oocyte
- The products of sperm development that follows reductional division.
- The products of Meiosis 1 in egg development.
Polar body
- The products of Meiosis 1 in egg development.
- The cell in egg development that gets a set of chromosomes, but little cytoplasm
S-phase of interphasae
The stage of the cell cycle when the DNA is copied
Reductional Division
The type of cell division when the cell goes from 2N to 1N
Chromatid
Half of a replication chromosome
Centromere/ Kinetochore
The region on the chromosome to which spindle fibers attach in mitosis
Mitosis
The type of cell division that produces two copies of the original parent
Meiosis one
The type of cell division when the cell goes from 2N to 1N
Tetrad
The name of a homologous chromosome pair following synapsis.
Binary fisson
Reproduction in prokaryotes
Diploid
An organism or cell that contains 2 copies of each type of chromosome
Haploid
- The number of chromosomes in an egg or sperm.
- The number of sets of chromosomes in a somatic cell
Prophase
- The stage of meiosis 1 when tetrads form
- The stage of meiosis 1 when crossing over occurs
- The stage in mitosis when chromosome condense and become visible as individual stands under a microscope
Cytokinesis
- The stage in the cell cycle when the cytoplasm divides in half.
Metaphase
A stage of Mitosis when chromosomes are aligned down the center of cell
Anaphase of Mitosis
2 stage in the cell cycle when sister chromatids separate from each other
Telophase
The stage in mitosis which typically overlaps with cytokinesis.
-The stage in mitosis when the chromosomes returns to the uncondensed state.
Centrosome
The organelle from which spindle fibers originate and branch out
Anaphase of Meiosis one
The stage of meiosis when homologous chromosome separate
Anaphase of Meiosis two
-2 stage in the cell cycle when sister chromatids separate from each other.
-Stages in egg development when it is composed of unpaired chromosomes composed if two chromatids
end of meiosis 1 and beginning of meiosis 2
-The stage of meiosis when a replication chromosome first becomes two separate chromosomes
