Your question: Which of the following important event in meiosis explains the variation in characteristic among organisms?

During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.

What event in meiosis creates genetic variation?

During prophase of meiosis I, the double-chromatid homologous pairs of chromosomes cross over with each other and often exchange chromosome segments. This recombination creates genetic diversity by allowing genes from each parent to intermix, resulting in chromosomes with a different genetic complement.

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What is the importance of meiosis in bringing variation?

The most significant important of meiosis in creating variations is that meiosis does not produce genetically identical gametes, which means that all offsprings produced are unique.

What are the important events that occur during meiosis?

Major Events in Meiosis

Stage Major Events
Meiosis I
Prophase I Chromosomes condense , homologous chromosomes synapse, crossing over takes place, nuclear envelope break down and mitotic spindle forms.
Metaphase I Homologous pairs of chromosomes line up on the metaphase plate.

Which processes increase variation during meiosis?

Meiosis also produces genetic variation by way of the process of recombination. Later, this variation is increased even further when two gametes unite during fertilization, thereby creating offspring with unique combinations of DNA.

Which event normally contributes to genetic variation?

Meiosis and fertilization create genetic variation by making new combinations of gene variants (alleles).

Which of the following characteristics of meiosis explains why this process contributes to genetic diversity within a population?

Meiosis contributes to genetic variation due to which of the following characteristics of the process? When homologous chromosomes split, sections of chromosomes can switch places. … Organisms that reproduce asexually exhibit genetic variation.

What is the importance of meiosis in bringing about variation class 9?

It results in an offspring, which has the genetic material of two different individuals. A new combination of genetic information is produced in the gametes. This ultimately results in a new and unique set of chromosomes.

Which event occurs during meiosis that increases genetic variation and contributes to the process of evolution?

Genetic variation is increased by meiosis

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Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I.

What are 3 reasons to explain genetic variations in meiosis?

Genetic diversity arises due to the shuffling of chromosomes during meiosis.

  • Process of Meiosis. A man produces sperm and a woman produces eggs because their reproductive cells undergo meiosis. …
  • Crossing Over. …
  • Random Segregation. …
  • Independent Assortment.

Which of the following is the most important event in meiosis?

The important event of meiosis is the crossing over.

What are the important events that happen during each stage of meiosis 2?

In meiosis II, the sister chromatids separate, making haploid cells with non-duplicated chromosomes. Prophase II: Starting cells are the haploid cells made in meiosis I. Chromosomes condense. Metaphase II: Chromosomes line up at the metaphase plate. Anaphase II: Sister chromatids separate to opposite ends of the cell.

Which of the following is the most significant event in meiosis?

Answer: The most significant phase of meosis is prophase 1 in which crossing over of two bivalent homologous chromosomes occur which is main cause for the Variation in organisms. Explanation: second option is correct .. .!!!

Which events happen in meiosis but not in mitosis quizlet?

Which of the following occurs during meiosis but not during mitosis? Synapsis occurs. The pairing of homologous chromosomes that only occurs during prophase I of meiosis is called synapsis.

What events occur during meiosis and fertilization that result in offspring having a mix of their parents traits?

What events occur during meiosis and fertilization that result in offspring having a mix of their parent’s traits? During prophase I, crossing over occurs and inherited chromosomes are different from parent cell. Furthermore, variant sperm fertilize variant eggs.

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What are the three ways meiosis increases genetic variation?

Genetic Variation

  • mutation.
  • random mating between organisms.
  • random fertilization.
  • crossing over (or recombination) between chromatids of homologous chromosomes during meiosis.