During meiosis some of the genes inherited from your mother get swapped onto the strand of
dna you inherited from your father, and vice versa. this event is called crossing over.
which outcome is the ultimate result of crossing over?
disintegration of the nuclear membrane
o decreased likelihood of twins
increase in the variability of phenotypes
o a smaller number of chromosomes

The outcome resulting from crossing over is increase in the variability of phenotypes.

Explanation:

The non-sister chromatids tend to exchange some of the segments of chromosomes during  the process of meiosis. This phenomenon is termed as crossing over or recombination.

Due to crossing over, a variety of different combinations are achieved in the genes. Hence, crossing over results in increased number of variability of phenotypes. The wide variety of genetic diversity produced is due to this phenomenon i.e crossing over or recombination.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.