1. The following statements are true about meiosis except: A. During prophase I
ID: 3499 • Letter: 1
Question
1. The following statements are true about meiosis except:A. During prophase I of meiosis, homologous chromosomes pairtightly to form
tetrads.
B. Crossing over takes place only between nonsister chromatids.
C. The end result of meiosis is four haploid cells.
D. During meiosis, chromosomal material replicates twice.
E. The most important consequence of meiosis is the production ofgenetic variation.
F. Meiosis only occurs in eukaryotes that reproduce sexually.
G. Exchange of genetic material takes place during the process ofcrossing over of
chromosomes.
Explanation / Answer
During meiosis, chromosomal material does NOT replicate. Chromosomes are made of DNA. DNA replicates duringsynthesis of the cell cycle. This cellular process occursprior to meiosis (and mitosis). You may remember studyingthis process (DNA replication) when you learned about the structureof DNA. During meiosis, the chromosomal material is divided in half"twice" (meiosis I and meiosis II). In meiosis I thehomologous chromosome pairs separate and in meiosis II the sisterchromatids separate. I recommend that you reveiw the steps of meiosis focusingclosely on the events of prophase I (first step of meiosis),crossing over and the reason meiosis is important for sexuallyreproducing organisms. All of the letter choices except D appear to be correct.Related Questions
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