Question

matching question
match each step of meiosis i to a key event during that step by dragging the names of the steps to their descriptions.
instructions
homologous chromosomes
pair up during synapsis and
crossing over occurs.
pairs of homologous
chromosomes line up.
independent assortment
occurs as homologous
chromosomes separate and
are pulled to opposite poles.
nuclear envelopes form
around chromosomes. nuclei
are haploid.
prophase i
telophase i
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Explanation:

To solve this matching problem, we recall the key events of each stage of meiosis I:

1. Prophase I: Homologous chromosomes pair up (synapsis) and crossing over occurs. So the description "Homologous chromosomes pair up during synapsis and crossing over occurs" matches with Prophase I.
2. Metaphase I: Pairs of homologous chromosomes (tetrads) line up at the metaphase plate. So the description "Pairs of homologous chromosomes line up" matches with Metaphase I.
3. Anaphase I: Homologous chromosomes separate and move to opposite poles (independent assortment occurs). So the description "Independent assortment occurs as homologous chromosomes separate and are pulled to opposite poles" matches with Anaphase I.
4. Telophase I: Nuclear envelopes form around the chromosomes, and the resulting nuclei are haploid (have half the number of chromosome sets). So the description "Nuclear envelopes form around chromosomes. Nuclei are haploid" matches with Telophase I.

Answer:

• "Homologous chromosomes pair up during synapsis and crossing over occurs" → Prophase I
• "Pairs of homologous chromosomes line up" → Metaphase I
• "Independent assortment occurs as homologous chromosomes separate and are pulled to opposite poles" → Anaphase I
• "Nuclear envelopes form around chromosomes. Nuclei are haploid" → Telophase I