Multiple Choice
During which phase of meiosis does crossing over between homologous chromosomes occur?
20
views
9. Mitosis and Meiosis
Meiosis
Multiple Choice
How does a tetrad form during prophase I of meiosis?
A
Two replicated chromosomes align independently at the metaphase plate, and this alignment is called a tetrad.
B
Sister chromatids separate at the centromere and then rejoin with non-sister chromatids to create a four-chromatid structure.
C
A haploid set of chromosomes replicates and immediately forms tetrads without homologous pairing.
D
Homologous chromosomes undergo synapsis and pair along their lengths, producing a structure containing four chromatids (a tetrad).
Verified step by step guidance1
Understand that during prophase I of meiosis, homologous chromosomes (each consisting of two sister chromatids) come together in a process called synapsis.
Recognize that synapsis involves the pairing of homologous chromosomes along their entire length, aligning gene by gene.
Know that this pairing results in a structure called a tetrad, which contains four chromatids (two from each homologous chromosome).
Be aware that the formation of the tetrad allows for crossing over, where non-sister chromatids exchange genetic material, increasing genetic diversity.
Remember that the tetrad is a key feature distinguishing meiosis from mitosis and is essential for the proper segregation of homologous chromosomes during meiosis I.
Related Videos
Related Practice
