Multiple Choice
In which of the following phases does crossing over occur?
17. Meiosis and Sexual Reproduction
Meiosis
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Which of the following life cycles uses meiosis after fertilization?
A
Gametic meiosis
B
Zygotic meiosis
C
Sporic meiosis
Verified step by step guidance1
Understand the three types of life cycles: gametic, zygotic, and sporic meiosis. Each has a distinct sequence of events involving meiosis and fertilization.
In gametic meiosis, meiosis occurs to produce gametes, and fertilization results in a diploid zygote. Meiosis does not occur after fertilization in this cycle.
In zygotic meiosis, fertilization produces a diploid zygote, which then undergoes meiosis to produce haploid cells. This is the life cycle where meiosis occurs after fertilization.
In sporic meiosis, also known as alternation of generations, both haploid and diploid multicellular stages exist. Meiosis occurs to produce spores, not directly after fertilization.
Identify that zygotic meiosis is the correct answer because it is the only life cycle where meiosis occurs after the formation of the zygote through fertilization.
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