What happens during prophase of meiosis I?cytokinesis begins, the cells pinch off, forming two cellsthe duplicated homologous chromosomes pair up and exchange their chromatid segmentsthe spindle fibers are made by centrosomes and are attached to the centromeres of the chromosomesspindle fibers reform and attach to the haploid chromosomes

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

Why was mendel's work not accepted at the time? o a. his results were false. o b. he did not repeat his experiments. o c. he did not have any data. o d. his results were surprising,