Answer:
They allow a reduction in chromosomes while preserving most of the cytoplasm for one egg.
Explanation:
In ovary oogenesis occurs for the formation of ovum or egg.
During oogenesis primary oocyte on meiosis - I forms one secondary oocyte and one polar body.
In the next step secondary oocyte on meiosis-II forms one ovum and one polar body.
Polar bodies are small cells which have less cytoplasm.
Polar bodies are meant for preserving cytoplasm to ovum so that ovum is rich in cytoplasm and it has only half of the chromosomes.
Sickle cell anemia is a genetic disease with severe symptoms, including pain and anemia. The disease is caused by a mutated version of the gene that helps make hemoglobin a protein that carries oxygen in red blood cells. People with two copies of the sickle cell gene have the disease.
I think both are A I’m not sure
Answer:
The correct answer is - chromosomes align at the spindle equator.
Explanation:
Chromosomes move and align at the spindle equator during the metaphase stage of mitosis and other given events take place during the anaphase stage of the mitosis cell division. Metaphase is the second phase of the M-phase of mitosis division whereas anaphase is the third phase.
The metaphase is characterized by the alignment of the chromosomes at the equator whereas the anaphase is separating the chromosomes pulled towards the poles and division of centromeres.