I would say immigration only.
emigration would theoretically reduce the genetic variation as unique individuals leave, but immigration would bring unique traits into circulation in an ecosystem.
I'm not super great at biogy tho so this might not be right... :)
In order: 50% 0% 100%? 50%
you have a 50% chance of having healthy offspring b/c they do not possess the gene
0% b/c they all carry the disease
100% b/c all of them have the recessive gene
50% b/c there’s only two that are completely recessive (aa)
5 chromosomes. Meiosis results in 4 haploid cells, meaning they have "n" pairs of chromosomes. The diploid cell that the 10 chromosomes originated in has "2n" pairs. This leaves us with a simple equation to solve the problem, 2n=10, so n must equal 5 chromosomes.
There is an irruption
Lava gets cooled with water (lake)
It turns to magma
