Probability: The chance of something happening and the likelihood of a particular event happening.
Embryonic stem cells! when given the chemical/hormone ques differentiate into all types of somatic cells.
Mitosis is the term i believe you're looking for
Answer:
Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.
Explanation:
The duplicated homologous chromosomes pair, and crossing-over (the physical exchange of chromosome parts) occurs.