In the life cycle, the light arrows represent haploid stages with 23 chromosomes while the dark arrows represent diploid stages with 46 chromosomes.
From the complete question, the haploid life cycle refers to the simplest life cycle. When there's a fusion of haploid gametes, a diploid zygote will be formed. This stage typically has 23 chromosomes.
In the diploid stage, the cells gave two sets of chromosomes. Therefore, the dark arrows represent diploid stages with 46 chromosomes.
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