What happens to sister chromatids in meosis 2?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates

Identify the structures ! 20 points