객관식
Independent assortment of chromosomes is a result of which of the following processes?
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12. Meiosis
Genetic Variation During Meiosis
객관식
Which of the following answers is neither involved with crossing over nor an outcome of crossing over?
A
The DNA in two nonsister chromatids is broken by specific proteins at exact points.
B
Chiasmata indicate where crossing over is occurring between homologs.
C
Recombination leads to the formation of chromosomes containing paternal and maternal alleles.
D
All of the listed responses pertain to the process of crossing over.
E
Independent assortment results from the random alignment of homologous pairs of chromosomes at metaphase I.
검증된 단계별 안내1
Understand the concept of crossing over: Crossing over is a process during meiosis where homologous chromosomes exchange genetic material. This occurs during prophase I of meiosis and results in genetic recombination.
Identify the role of nonsister chromatids: During crossing over, the DNA in two nonsister chromatids is broken and rejoined, leading to the exchange of genetic material. This is a key part of the crossing over process.
Recognize the significance of chiasmata: Chiasmata are the visible manifestations of crossing over, indicating where the exchange of genetic material has occurred between homologous chromosomes.
Understand recombination: Recombination is the outcome of crossing over, resulting in chromosomes that contain a mix of paternal and maternal alleles, increasing genetic diversity.
Differentiate independent assortment: Independent assortment is a separate process from crossing over. It refers to the random alignment of homologous chromosome pairs during metaphase I of meiosis, leading to the random distribution of maternal and paternal chromosomes into gametes. This is not directly related to crossing over.
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