Multiple Choice
In humans, how many chromosomes are present in a mature sperm cell after meiosis is complete?
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17. Meiosis and Sexual Reproduction
Meiosis
Multiple Choice
Which event occurs during meiosis but not during mitosis?
A
Condensation of chromosomes and breakdown of the nuclear envelope
B
DNA replication during S phase prior to cell division
C
Separation of sister chromatids during anaphase
D
Synapsis and crossing over between homologous chromosomes during prophase I
Verified step by step guidance1
Understand the key differences between mitosis and meiosis, focusing on the unique events that occur in meiosis but not in mitosis.
Recall that both mitosis and meiosis involve condensation of chromosomes and breakdown of the nuclear envelope, so these events are common to both processes.
Recognize that DNA replication during the S phase occurs before both mitosis and meiosis, so this is not unique to meiosis.
Note that separation of sister chromatids happens during anaphase in both mitosis and meiosis II, so this event is also not unique to meiosis.
Identify that synapsis and crossing over between homologous chromosomes during prophase I is a distinctive event of meiosis, where homologous chromosomes pair up and exchange genetic material, increasing genetic diversity. This does not occur during mitosis.
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