Mitosis & Meiosis Flashcards
they are two specialized cells that join during sexual reproduction -
gametes
the cell division where the number of chromosomes are cut in half -
Meiosis
Two type of gametes -
Female & male
Female -
eggs
male -
sperm
cells that are formed from the union of egg & sperm -
zygotes
what cells are NOT gametes -
somatic cells
HALF the # number of chromosomes -
Haploid
NORMAL # of chromosomes -
Deploid
23chromosomes -
haploid
46chromosomes-
deploid
chromosomes that occur in pairs & contain similar genes -
homologous chromosomes
Two divisions-
Meiosis I
Meiosis II
Steps of Meiosis I -
Prophase I
Metaphse I
Anapahse I
Telophase I
the resting stage between the two divisions -
interkinesis
The steps of Meiosis II -
Prophase II
Metaphase II
Anaphase II
Telophase II
the pairing of homologous chromosomes -
synapsis
group of 2 chromosomes w/ 2 chromatids = four chromatids total -
Tetrad
What happens in Prophase I-
synapsis
crossing over
tetrad
Metaphase I -
paired chromosomes move to middle
Anaphase I -
the chromosomes move to opposite poles
Telophase I -
cell divides & two cells are formed
Interkinesis -
the resting stage between the cell divisions
Prophase II-
individual chromosomes are visible