Why crossing over is important

Apr 30, Explanation: Sexual reproduction involves fusion of male and female gametes. Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2?

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Correct answer: Prophase I. Explanation : During prophase I homologous chromosomes will line up with one another, forming tetrads. Report an Error. What is the evolutionary purpose of cells that undergo crossing over? Possible Answers: To produce gametes that are genetically identical. Correct answer: To increase genetic diversity. Explanation : Crossing over is a process that happens between homologous chromosomes in order to increase genetic diversity.

Example Question 3 : Understanding Crossing Over. During which step of cell division does crossing over occur? Possible Answers: Metaphase II. Explanation : When chromatids "cross over," homologous chromosomes trade pieces of genetic material, resulting in novel combinations of alleles, though the same genes are still present. Example Question 4 : Understanding Crossing Over.

What structures exchange genetic material during crossing over? Possible Answers: Egg and sperm chromosomes. Correct answer: Nonsister chromatids. Explanation : During crossing over, homologous chromosomes come together in order to form a tetrad.

Example Question 5 : Understanding Crossing Over. Crossover of homologous chromosomes in meiosis occurs during which phase? Possible Answers: Prophase II of meiosis. Correct answer: Prophase I of meiosis. Explanation : The crossing over of homologous chromosomes occurs in prophase I of meiosis.

Example Question 6 : Understanding Crossing Over. During crossing over, two homologous chromosomes pair to form which of the following choices? Possible Answers: Tetrad. Correct answer: Tetrad. Explanation : The tetrad, which divides into non-sister chromatids, exchanges genetic information in order to make the genetic pool more variant, and result in combinations of phenotypic traits that can occur outside of linked genotypic coding. Browse Visually. Other Topic Rooms Genetics.

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