Chapter 9.6

Question 1

How do meiosis and mitosis simmilar

Answer 1

1. are both mechanisims that divide a eukaryotic cell genetic material
2. dna copies material ( replicate) before both in interphase
3. Both condense in Prophase
4. spindle fibers orchestrate movement of chromosomes

Question 2

How do meiosis and mitosis diffferent

Answer 2

Mitosis ** Meiosis**

1. somatic cells 1. germ cells
2. throughout the life cycle 2.only in some stages of life
3. Homologous donot align 3. Line up in Metaphse I
4. No crossover 4. Crossover
5. yeild 2 identical daughter 5. genetically variable

                                                         4 daughter cells       cells( for growth, repair                    ( for sexual reproduc

   and a asexual reproduction)
6. occurs only once 6. cytokinesis occurs twice
7. # of chrom = parent cell 7. diploid cells = 4 haploid
8. 2n = 2n x 2n 2n= n xn = n x n x n x n

Question 3

In what ways are mitosis and meiosis similar?

Answer 3

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.

Question 4

. In what ways are mitosis and meiosis different?

Answer 4

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.