MEIOSIS Flashcards
what is the purpose of meiosis
to make gametes (sex cells)
which cells undergo meiosis
germ line cells (testis and ovaries)
what are the products of meiosis
four genetically unique haploid cells
difference between meiosis 1 and meiosis 2
meiosis 1:
number of cells increased
number of chromosomes divide by 1/2
separates homologous chromosomes
paired chromosomes
meiosis 2:
just like mitosis
chromosome number doesn’t get reduced
separates sister chromatids
no paired chromosomes
prophase I
tetrads (joined pair of homologous chromosomes) form
metaphase I
tetrads line up in the middle of the cell
anaphase I
homologous chromosomes separate and travel to opposite ends of the cell
prophase II
double chromosomes comprise of two sister chromatids form
metaphase II
sister chromatids line up in the middle of the cell
anaphase II
sister chromatids separate from one another and travel to opposite ends of the cell
homologous chromosomes
pairs of similar chromosomes
same shape
code for same trait
one come from mom the other comes from dad
tetrad
joined pair of homologous chromosomes
diploid
a cell with two sets of chromosomes
haploid
a cell with one set of chromosomes
germ line cells only
mitosis
1 cell division
chromosome number stays the same
daughter cells
genetically identical
occurs in somatic cells
