Ch11 Cell Division

Question 1

Contrast between mitosis and meiosis and state the significance of their difference

Answer 1

1. In first meiotic division, the homologous chromosomes pair up on the equator of the cell but no such process in mitosis. This allows the segregation of two memebers of homologous chromosomes into the daughter cells. The daughter cell formed only one set of chromosome (Haploid).
2. In the first meiotic division, homologous chromosomes speperate and are assorted independently. Genetic variation are produced. At the sexual reproduction, random fertilization of gametes produces offspring with genetic variation.
3. In the first meiotic division, crossing over between non-sister chromatids of a pair of homologous chromosomes may occur. The exchange of genetic material produces gametes with genetic variation.
4. Mitosis involves one cell division while meiosis involves two. The duaghter cell formed in mitosis are genetically identical to the parent cells which is important for thr growth/repair/ asexual-reproduction. The daughter cell formed in meiosis contains half the genetic content of the parent cell. Haploid gamated are produced. This ensures the restoration of the diploid number of chromosome in the zygote at fertilization.

Question 2

Contrast between mitosis and meiosis and state the significance of their difference

Answer 2

1. In first meiotic division, the homologous chromosomes pair up on the equator of the cell but no such process in mitosis. This allows the segregation of two memebers of homologous chromosomes into the daughter cells. The daughter cell formed only one set of chromosome (Haploid).
2. In the first meiotic division, homologous chromosomes speperate and are assorted independently. Genetic variation are produced. At the sexual reproduction, random fertilization of gametes produces offspring with genetic variation.
3. In the first meiotic division, crossing over between non-sister chromatids of a pair of homologous chromosomes may occur. The exchange of genetic material produces gametes with genetic variation.
4. Mitosis involves one cell division while meiosis involves two. The duaghter cell formed in mitosis are genetically identical to the parent cells which is important for thr growth/repair/ asexual-reproduction. The daughter cell formed in meiosis contains half the genetic content of the parent cell. Haploid gamated are produced. This ensures the restoration of the diploid number of chromosome in the zygote at fertilization.