Download document 8903079

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Tissue engineering wikipedia , lookup

Endomembrane system wikipedia , lookup

Cell encapsulation wikipedia , lookup

Extracellular matrix wikipedia , lookup

Programmed cell death wikipedia , lookup

Cellular differentiation wikipedia , lookup

Cell culture wikipedia , lookup

Cell nucleus wikipedia , lookup

Organ-on-a-chip wikipedia , lookup

Spindle checkpoint wikipedia , lookup

Biochemical switches in the cell cycle wikipedia , lookup

JADE1 wikipedia , lookup

Cell cycle wikipedia , lookup

Cell growth wikipedia , lookup

List of types of proteins wikipedia , lookup

Amitosis wikipedia , lookup

Chromosome wikipedia , lookup

Cytokinesis wikipedia , lookup

Meiosis wikipedia , lookup

Mitosis wikipedia , lookup

Transcript
I.
Biology Mitosis / Meiosis 2012 – 2013 #4 Meiosis = cell division that results in 4 haploid cells -­‐ meiosis begins with the process of interphase • DNA is replicated in the “S” period of interphase (same as mitosis) A. Prophase 1 1. nucleus (and nucleolus) disappear 2. spindle fibers appear and stretch across the cell 3. DNA condenses into chromosomes 4. Homologous pairs of chromosomes (one from mom, one from dad) match up -­‐ homologous pairs form a tetrad 5. process of crossing over occurs as the homologous pairs are matched up -­‐ creates genetic diversity as every sperm or egg is unique B. Metaphase 1 1. tetrads line up in the middle of the cell C. Anaphase 1 1. homologous pairs separate and travel to opposite ends of the cell D. Telophase 1 1. nuclei reform around the chromosomes 2. cell splits (cytokinesis) into 2 haploid cells E. Prophase II 1. nuclei disappear 2. spindle fibers appear F. Metaphase II 1. chromosomes line up in the middle of the cell G. Anaphase II 1. chromatids separate and travel to opposite ends of the cell H. Telophase II 1. nuclei reform around chromosomes 2. cell splits (cytokinesis) to form 4, unique haploid cells