Which best describes oogenesis and spermatogenesis?
a. during oogenesis, the cells become haploid after meiosis i, while in spermatogenesis, the cells become haploid after meiosis ii.
b. in both oogenesis and spermatogenesis, the cells become haploid after meiosis i.
c. in both oogenesis and spermatogenesis, the cells become haploid after meiosis ii.
d. during spermatogenesis, the cells become haploid after meiosis i, while in oogenesis, the cells become haploid after meiosis ii.

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.

Asap. this question is 100 points if you answer it question: describe the basic relationship between ocean depth and temperature seen in the graph

Explain how the political influence of african americans leaders became weaker.