test #2 - The Selfish Gene your genes drive your actions...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
The Selfish Gene. your genes drive your actions. Cell Reproduction: 3 ways. 1. Binary Fission , asexual, prokaryotic 2. Mitosis : asexual , eukaroytic 3. Meiosis: sexual , eukaroytic. Functions of Mitosis: 1. Unicellular organisms new individuals 2. Multi cellular new individuals 1. growth 2. repair- damage 3. replacement- 4 million per second of red blood cells. Mechanics of Mitosis: chromatin- the state that DNA is inside the nucleus. (net) For 2 cells Require: 2 nuclei and 2 sets of DNA. Replicate of duplicate your chromosomes \/ DNA to produce 2 sets. the X is a replicated or duplicated chromosome. one half of the the chromosome is chromatid. two sister chromatids are joined in the middle ( per say) by a centromere. Karyotype: the number of chromosomes laid out together. 46 chromosomes = 23 pairs. pair # 1 – 22 are known as autosomes. the final pair is used to determine sex. mothers and fathers 1 chromosome that make up 2 homologous pairs of chromosomes. IPMAT Inter phase= cell with its DNA spread out. 1 st stage of mitosis Pro phase = loss of the nuclear membrane, the DNA condenses into identifiable replicated chromosomes, (pro phase is packaging) , we start to get a polar nature to the cell , spindle fibers form. Meta Phase= spindle fibers line up the chromosomes in the middle of the cell. (meta phase chromosomes lined up in the Middle of cell) Ana-phase= separation of sister chromatids, pulled to north and south side of the cell.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Telophase = re formation of nuclear membrane around the sperated sister chromatids. cytokinesis= cell movement. cytoplasm divides into 2 and 2 new cells are formed. . somatic cells= general body cells. ( where mitosis occurs) cell cycles : ¼ of the cells cycle is Mitosis; from the time of a new cell to the beginning of mitosis is known as inter phase. G1 S G2 are the ¾ of the cell cycle. G1= small cells , cell grows here. .. ,but as well it has a specialized process to occur as well. . S= synthesis of DNA here. . chromosomes replicate here. . G2= more metabolism takes place. . some cells are perma-locked in g1. nerve cells muscle cells( heart) Sexual Reproduction : Meiosis -> genetic recombination :::remember the human karyeotype:::: homologous pairs. ... 23 of em. . homologous chromosome: from the K type.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 8

test #2 - The Selfish Gene your genes drive your actions...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online