List the sub-stages during prophase i of meiosis, and describe the appearance/position of the chromosomes at each sub-stage.

Sub-stages during Prophase I of meiosis are: Leptotene; zygote; pachytene; diplotene and diakinesis.

Explanation:

In the sub-phase called leptotene, each chromosome is formed by two sister chromatids, where we can notice the presence of chronomers, which are small condensations.

 Talking about the zygotene sub-phase, the chromossomes begin to pair up, and this process is called synapse.

 The next sub-phase, called pachytene, each pair of homologous chromosomes has four chromatids, constituting one bivalent or tetrad, formed by sister chromatids and this is where the process called permutation or crossing-over occurs. Due to this process, we were able to visualize the chiasm under the microscope, which is nothing but an X cross.

 The next sub-phase called diplotene, homologous chromosomes begin to drift apart but remain linked by regions where permutation occurred and in this sub-phase we can see the chiasm regions better than tha phase before.

 In the last sub-phase called diakinesis, the condesation and separation of homologous chromosomes continue to happen With this, the chiasmas are sliding to the tips of the chromáids, a process called chiasma termination. As the phases evolve, the nucleolus and library disappear.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: