What are the phases of the sun's life cycle

The sun begins its life like any other star, from the dust and gas in a swirling cloud. The particles condense together until there is enough pressure to begin nuclear fusion. At this point in the sun's life-cycle, it is a star in the main sequence phase of life.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: