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Cell division92407 - i Homologous pairs(88x(88y 1...

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Cell division 1. Mitosis a. Asexual reproduction b. Going to produce two new cells, each one is going to be identical i. Need to be the same because cells work together ii. Diploid # - number of chromosomes c. Multicellular creature that reproduces sexually- two parents i. Diploid #- combination of chromosomes from 2 parents ii. Each parent contributes 50% of chromosomes iii. Within that should be 2n zygote 2. Human Being a. Diploid number for human being is 46 b. Female 23/male23 3. Sister chromatic a. Cannot distinguish chromosomes when not pared b. Chromatin- when DNA relaxed…individual chromosomes are spread all throughout. (Throughout what?) c. 1 chromosomes (8) d. Centromere- region in the chromosome where the chromosome has been pulled down and constricted really tight 4. S-phase (the chromosomes replicates) a. Each one of the chromosomes makes the DNA inside replicate (88) sister chromatic b. At the end of the s-phase there better be 92 (46 pairs of chromosomes)
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Unformatted text preview: i. Homologous pairs- (88x)(88y) 1. Homologue- (8xchromosome)(8ychromosome) 2. One from father and one from mother a. Chromosome 2- if didn’t have two similar ones then (“private talk”) b. Each one will make a replica of self 5. Mitosis- defined as the division of the nucleus. What it takes to get the nucleus to the point where split and get two new chromosomes… a. Other division of nucleus is cytokinesis- this is different 6. Cell cycle-a. Majority of the time the cell is not dividing i. Some cells divide once then never divide again 1. Muscle, brain, spinal b. Prophase-i. S-phase has already taken place ii. G1-phase has already taken place-if get through G1 then cell goes to the s-phase. iii. G2 Gate- enough stuff and everything has gone smoothly, now can divide iv. Prometaphase-microtubules have a role- distinct region “equator”...
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Cell division92407 - i Homologous pairs(88x(88y 1...

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