Meiosis Key Term

Interphase

• A genetic structure in a cell composed of condensed DNA, which contains the genetic code for an organism.

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• A mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms.

• Set of chromosomes (one from each parent), that are very similar to one another and have the same size/shape.

Chromosome

• A genetic structure in a cell composed of condensed DNA, which contains the genetic code for an organism.

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• A mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms.

• Set of chromosomes (one from each parent), that are very similar to one another and have the same size/shape.

Centromere

• The region of the chromosome associated with the attachment of the chromatids to the spindle fibers..

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• Refers to the copy of a chromosomes that results from DNA replication and is still closely linked to its original.

• Set of chromosomes (one from each parent), that are very similar to one another and have the same size/shape.

Homologous chromosomes

• A genetic structure in a cell composed of condensed DNA, which contains the genetic code for an organism.

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• Process in which homologous chromosomes trade parts.

• Set of chromosomes (one from each parent), that are very similar to one another and have the same size/shape.

Sister chromatids

• A genetic structure in a cell composed of condensed DNA, which contains the genetic code for an organism.

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• Refers to the copy of a chromosomes that results from DNA replication and is still closely linked to its original.

• The region of physical linkage between maternal and paternal homologous pairs during genetic reassortment. 
  

Tetrad

• Two duplicated homologous chromosomes (four chromatids) bound together by chiasmata during prophase I..

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• A mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms.

• Set of chromosomes (one from each parent), that are very similar to one another and have the same size/shape.

Chiasma

• Homologous chromosomes that are in synapse during meiosis.

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• A mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms.

• The region of physical linkage between maternal and paternal homologous pairs during genetic reassortment. 

  
  

Crossing Over

• Marks the location of crossover between two nonsister chromatids.

• Process in which homologous chromosomes trade parts.

• The formation of a close association between homologous chromosomes during prophase I

• The region of physical linkage between maternal and paternal homologous pairs during genetic reassortment.

Synapsis

• Process in which homologous chromosomes trade parts.

• Phase of the cell cycle where the cell grows and makes a copy of its DNA

• Marks the location of crossover between two nonsister chromatids.

• The formation of a close association between homologous chromosomes during prophase I.

Bivalent

• A genetic structure in a cell composed of condensed DNA, which contains the genetic code for an organism.

• The formation of a close association between homologous chromosomes during prophase I.

• Homologous chromosomes that are in synapse during meiosis.

• A genetic structure in a cell composed of condensed DNA, which contains the genetic code for an organism.