The Comment you have entered exceeds the maximum length. Submit Cancel. Comments Please Post Your Comment. No comments yet. Save Note Note. Save Cancel Delete. Next Prev Close Edit Delete. You have authorized LearnCasting of your reading list in Scitable. During , the homologous chromosomes pair up. The points along the chromosomes that make contact with the other pair are called.
These points of contact allow the of genetic information. This leads to a further increase in genetic. Send Your Results Optional. Your Name. To Email. Time is Up! Growth Patterns Inheritance and Probability. Passive and Active Types of Immunity Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. Homeostasis of Organism Water Regulation Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..
Biological Cell Introduction It only takes one biological cell to create an organism. Prophase II is similar to prophase in mitosis in that there is the break down of the nuclear membrane and the formation of spindle fibers in preparation for the separation of sister chromatids. 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.
During prophase I, homologous chromosomes pair with each other and exchange genetic material in a process called chromosomal crossover. The exchange occurs in segments over a small region of homology similarity in sequence, ie. The new combinations of DNA created during crossover provide a significant source of genetic variation.
Crossing over is a phenomenon that happens during Meiosis I in the attempt to create genetic diversity. Crossing over typically occurs between which of the following structures? Crossing over occurs when chromosomal homologs exchange information during metaphase of Meiosis I. During this stage, homologous chromosomes line up on the metaphase plate and exchange genetic information. Crossing over occurs during prophase I when parts of the homologous chromosomes overlap and switch their genes.
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Email address: Your name:. Example Question 1 : Understanding Crossing Over. Possible Answers: Metaphase I. 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. And it's this crossing over that lets recombination across generations of genetic material happen, and it also allows us to use that information to find the locations of genes. Joan E. Bailey-Wilson, Ph.
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