Answer to Question #135527 in Genetics for kyla Zamora

Question

Given a diploid number of 2N=8 and atleast 2 crossing over events, trace the fate of these chromosomes until the formation of haploid daughter cells in Meiosis II.

Answer 1

Prophase I

Under this phase,there is condensation of chromatin into chromosomes that can be seen through the microscope,physical contact between homologous chromosomes and the crossing over of genetic material between the physical chromosomes.

Metaphase I

Homologous pairs of chromosomes align on the equatorial plane at the center of the cell to ensure that homologous chromosomes do not end up in the same cell.

Anaphase I

Microtubules begin to shorten, pulling one chromosome of each homologous pair to opposite poles in a process called disjunction. The sister chromatids of each chromosome stay connected. The cell also begins to elongate in preparation for cytokinesis.

Telophase I

The chromosomes of each homologous pair arrive at opposing poles of the cell. The microtubules disintegrate, and a new nuclear membrane forms around each haploid set of chromosomes.

Meiosis II now begins also known as equational division, as the cells begin as haploid cells and end as haploid cells.