The answer is 2. This is why their autosomal cells are referred to as diploid in chromosome number. The gametes have only one set of chromosomes. The homologous pair (sister chromosome) separate during meiosis I. If there was an extra chromosome in addition to this set then this would cause a condition called aneuploidy.
It would be the nuclear membrane
Brown algae is eukaryotic cell
Well, as asexual reproduction suggets that offspring is genetically identical, you can assume that the "mother cell" qlso has 24 chromosones and thus may potentially have a genetic disorder