Meiosis Flashcards
Diploid
two copies of each chromosome in the cell
Haploid
One copy of each chromosome in the cell
Somatic Cells
Body cells, every cell in your body that is not a sex cell, Cells that make up your skin, heart, lungs, kidneys, etc. Made via Mitosis
Gametes
Sex cells/reproduction cells, Sperm cells (male) Egg cells (female) Made via meiosis
Meiosis Overview
Meiosis = Interphase + PMAT and Cytoknesis x2
Independent Assortment
produces 2n distinct gametes, where n = the
number of unique chromosomes.
Crossing over
multiplies the already huge number of different gamete types produced by independent assortment.
Difference of Mitosis vs. Meiosis
Mitosis:
Type of cell divisions
Results in 2 cells
Daughter cells produced are identical to the origional parent cell
1 round of divisions
Produces Somatic Cels
Daughter cells have the same number of chromosomes as the origional parent cell
Daughter Cells produced are diploid
Meiosis:
Type of cell division
Results in 4 vells
Daughter cells produced are different than the original parent cell
There are 2 rounds of division
Produces sex cells (gametes) egg and sperm
Daughter cells have different number of chromosomes as the original parent cell
Daughter cells produced are haploid
Nondisjunction
When homologous pairs or sister chromatids fail to separate during either Meiosis I or Meiosis II resulting aneuploidy
Aneuploidy
When there are an abnormal amount of chromosomes
Monosomy
An individual is lacking chromosomes, usually results in death during fetal development
Trisomy
Individual has one additional chromosomes, usually results in something like down syndrome