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Meiosis

Terms in this set (51)

Binary Fission
cell division used for asexual reproduction by unicellular organisms
Synapsis
the pairing of homologous chromosomes during meiosis
Metaphase II
the haploid number of chromosomes lined up in single file in the middle of the spindle in meiosis
Meiosis
results in 4 daughter cells each with half of the mother cell's chromosomes
Fertilization
the union or fusion of gametes
Zygote
A fertilized egg
Gametes
Haploid sex cells
46
The diploid number for humans
Spermatogenesis
Meiosis to form sperm
Reduction Divison
Another name form Meiosis
Oogenisis
Meiosis to form an egg
Epithelial
Fastest dividing human cell
Sister Chromatids
the two identical copies of a chromosome still bound together at the centromere
Mitosis
results in 2 daughter cells identical to each other and the mother cell
Homozygous
words describing the two chromosomes in pair that have genes that code for the same traits
Diploid
having two chromosomes of each pair normal body cells
DNA Replication
Key event during S phase
23
Haploid # in humans
Crossing-Over
the exchange of parts by nonsister homologous chromatids during meiosis
Metaphase I
homologous pairs of chromosomes line up in the middle of the spindle during meiosis
Anaphase I
homologous pairs of chromosomes separate and move to opposite poles chromatids do not separate
Anaphase II
Sister chromatids seperate move to opposite poles in meiosis
Tetrad
4 chromatids
Anaphase II
Chromosomes pulled apart
4 haploid cells, 23 chromosomes
What is the result of Meiosis?
Karyotype
The # of chromosomes in the neclueus.
Synapsis
Pairing of 2 HC in meosis
Polar Bodies
Small red cells
Mitosis
Cell division dipolid cells are made
HC
Dna and attactched proteins scrunched in the nucleaus
Meiosis
Divison in whicht genetic recombination happens
Diploid (2n) All but sex cells
2 HC in the pair, which cells?
Haploid (n) sex cells
1 HC in the pair, which cells?
Gametes
Where meiosis occurs
Apotosis
Cell suicide
Homologous pairs/Synapsis
How prophase I differs in meosis
Fertilization (Zygote)
When 2 games join, they form a what?
Autosome
A chromosome that is not a sex one.
Synapsis and Crossing over
Occur in Prophase I
Segregation and Independent Assortement
Occurs in Metaphase I
Interphase I
Cell divdes twice but only copies DNA once
Prophase I
Homologous pairs find each other to from a tetrad
Tetrads seperate not sister chromatids
Meta, Ana, and Telo I simular to mitosis except ...
F- 1 fertile and 3 polar bodies
Result of oogenesis
M- 4 fertile
Result of spermoogenis
2 haploid cells
After meiosis I you have..
4 haploid cells
after meiosis II you have..
lysosomes
helps digest polar bodies
Mitosis- 2 Diploid cells, genetically Identical, somatic (body Cells)
Mitosis results in:, cells are:, occurs in:
Meiosis- 4 Haploid cells, genetically different, sex cells
Meiosis results in:, cells are:, occurs in:
Independent Assortment
The process of random segregation and assortment of chromosomes during anaphase I, resulting in the production of genetically unique gametes.
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