Chapter 9.6 Flashcards
How do meiosis and mitosis simmilar
- are both mechanisims that divide a eukaryotic cell genetic material
- dna copies material ( replicate) before both in interphase
- Both condense in Prophase
- spindle fibers orchestrate movement of chromosomes
How do meiosis and mitosis diffferent
Mitosis ** Meiosis**
- somatic cells 1. germ cells
- throughout the life cycle 2.only in some stages of life
- Homologous donot align 3. Line up in Metaphse I
- No crossover 4. Crossover
- yeild 2 identical daughter 5. genetically variable
4 daughter cells cells( for growth, repair ( for sexual reproducand a asexual reproduction)
- occurs only once 6. cytokinesis occurs twice
- # of chrom = parent cell 7. diploid cells = 4 haploid
- 2n = 2n x 2n 2n= n xn = n x n x n x n
In what ways are mitosis and meiosis similar?
Mitosis and meiosis are similar in that both divide the chromosomes of a cell. Overall, the processes have a similar progression of stages, and similar mechanisms move chromosomes.
. In what ways are mitosis and meiosis different?
Mitosis occurs in somatic cells at any life cycle stage, whereas meiosis is restricted to germ cells at particular times in the life cycle. Mitosis involves only one cell division; meiosis involves two. Mitosis yields two daughter cells; meiosis yields four. Cytokinesis occurs once for every DNA replication event of mitosis; cytokinesis occurs twice for every DNA replication event of meiosis. Crossing over occurs only in meiosis; homologous chromosomes do not align with one another in mitosis. Daughter cells produced by mitosis are identical; daughter cells produced by meiosis are genetically variable. Daughter cells from mitosis are used for growth and repair and in asexual reproduction; daughter cells from meiosis are used in sexual reproduction.