Which of the following cellular processes would most likely lead to increased genetic variation in a population of organisms?A.DNA replication during S phase of the cell cycleB.Synapsis involving two homologous chromosomesC.Alternative splicing of gene transcriptsD.Cell division via mitosis
Question
Which of the following cellular processes would most likely lead to increased genetic variation in a population of organisms?A.DNA replication during S phase of the cell cycleB.Synapsis involving two homologous chromosomesC.Alternative splicing of gene transcriptsD.Cell division via mitosis
Solution
The process that would most likely lead to increased genetic variation in a population of organisms is B. Synapsis involving two homologous chromosomes.
Here's why:
A. DNA replication during S phase of the cell cycle: This process is designed to create an exact copy of the DNA. While errors can occur leading to mutations, it is not a process that inherently increases genetic variation.
B. Synapsis involving two homologous chromosomes: This is a process that occurs during meiosis, specifically in prophase I. It involves the pairing of two homologous chromosomes and often leads to crossing over, where segments of DNA are exchanged between the chromosomes. This results in new combinations of genes, which increases genetic variation.
C. Alternative splicing of gene transcripts: While this process can lead to different proteins being produced from the same gene, it does not change the underlying genetic code. Therefore, it does not contribute to genetic variation in a population.
D. Cell division via mitosis: This process results in two daughter cells that are genetically identical to the parent cell. Therefore, it does not contribute to genetic variation in a population.
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