Multiple Choice
Select the correct statement about reproduction and eukaryotic life cycles.
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12. Meiosis
Life Cycle of Sexual Reproducers
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In a life cycle with alternation of generations, multicellular haploid forms alternate with which of the following?
A
Multicellular triploid forms
B
Unicellular diploid forms
C
Unicellular haploid forms
D
Multicellular diploid forms
Verified step by step guidance1
Understand the concept of alternation of generations: This is a biological process in which an organism alternates between two multicellular stages—a haploid stage (gametophyte) and a diploid stage (sporophyte).
Recall that the haploid stage (gametophyte) produces gametes (sperm and egg) through mitosis. These gametes are haploid (n).
When two gametes fuse during fertilization, they form a diploid (2n) zygote. This zygote develops into the multicellular diploid stage, known as the sporophyte.
The sporophyte undergoes meiosis to produce haploid spores. These spores grow into the multicellular haploid stage, the gametophyte, completing the cycle.
Based on this understanding, the multicellular haploid forms alternate with multicellular diploid forms in the alternation of generations life cycle.
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