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Chromosomal crossover: Quiz

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Question 1: It is one of final phases of genetic recombination, which occurs during prophase 1 of ________ (diplotene) in a process called synapsis.
MitosisMeiosisChromosomeCell cycle

Question 2: Crossing over was described, in theory, by ________.
Hermann Joseph MullerAlbert Szent-GyörgyiThomas Hunt MorganCharles Scott Sherrington

Question 3: Morgan immediately saw the great importance of Janssens' cytological interpretation of chiasmata to the experimental results of his research on the heredity of ________.
Drosophila melanogasterDrosophilaModel organismMaize

Question 4: In most ________, a cell carries two copies of each gene, each referred to as an allele.
EukaryoteProtistFungusPlant

Question 5: The meiosis-specific recombinase Dmc1 and the general recombinase ________ coat the single-stranded DNA to form nucleoprotein filaments.
RAD51BRCA2BRCA1Abl gene

Question 6: Crossover usually occurs when matching regions on matching ________ break and then reconnect to the other chromosome.
AutosomeChromosomal translocationKaryotypeChromosome

Question 7: He relied on the discovery of the Belgian Professor Frans Alfons Janssens of the ________ who described the phenomenon in 1909 and had called it 'chiasmatypie'.
Université catholique de LouvainKatholieke Universiteit LeuvenCatholic University of LeuvenOld University of Louvain

Question 8: The physical basis of crossing over was first demonstrated by Harriet Creighton and ________ in 1931.
Roger Wolcott SperryBarbara McClintockEdward B. LewisEric Kandel







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