Item9eBookReferencesItem 9Which is true about the ploidy of moss sporophytes and gametophytes?Multiple ChoicePloidy does not differ.Sporophytes are N, gametophytes are 2N.Sporophytes are 2N, gametophytes are N.Ploidy is variable.
Question
Item9eBookReferencesItem 9Which is true about the ploidy of moss sporophytes and gametophytes?Multiple ChoicePloidy does not differ.Sporophytes are N, gametophytes are 2N.Sporophytes are 2N, gametophytes are N.Ploidy is variable.
Solution
The correct answer is "Sporophytes are 2N, gametophytes are N."
Here's why:
In the life cycle of moss, there are two distinct phases: the gametophyte phase and the sporophyte phase.
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The gametophyte phase is the dominant phase in the life cycle of moss. During this phase, the moss is haploid (N), meaning it has a single set of chromosomes. The gametophyte produces gametes (sperm and egg cells) which are also haploid.
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When a sperm and egg cell from the gametophyte phase fuse during fertilization, they form a diploid (2N) zygote. This zygote grows and develops into the sporophyte phase.
So, the sporophytes are diploid (2N) and the gametophytes are haploid (N).
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