BIO 235 Exam 2 Questions and Answers 100% Pass

BIO 235 Exam 2 Questions and Answers 100% Pass How is recombination frequency used to form a map of a chromosome with relative distances between genes? - -related to distance between genes -can indicate linkage or non linkage -lower the frequency, closer they are What is the maximum recombination frequency between two genes and why? - The maximum recombination frequency observed will be 50%, as the higher the recombination frequency, the more double crossover events will occur due to the distance between the genes. This means past a certain point, there will be many crossover events that are detected, underestimating the recombination frequency. 2 100% Pass Guarantee Katelyn Whitman, All Rights If two genes are showing recombination 15% of the time they are _____________. If two genes show a recombination frequency of 50% they are_____________. - linked, un-linked If two genes are linked they are: - close to each other on the same chromosome When genes are linked, are the parental or recombinant classes higher in proportion in the F2 test cross offspring? - parental Two genes with a map distance of 15.5 map units between them indicates that: - 1) the genes are close to each other on the same chromosome 2) 15.5% of the dihybrid test cross offspring were of a recombinant class If the two genes from the previous question are genes A and B, in the test cross of Ab/aB x ab/ab, what proportion of the offspring will be AB/ab? - 7.25% When performing a dihybrid test cross, 1000 offspring have parental genotypes, and 500 offspring have recombinant genotypes totaling 1500 3 100% Pass Guarantee Katelyn Whitman, All Rights offspring. What is the genetic distance between these two genes? - 33.3 map units Are the two genes from the previous question linked? - yes A cross was performed between AB/ab x ab/ab and the following offspring was observed: 800 AB/ab, 830 ab/ab, 100 aB/ab, 180 Ba/ab. What are the recombinant genotypes? - aB/ab and Ba/ab Genetic distance determined from recombination frequency are additive because the greater the distance between genes, the lower the probability of double crossover events. - true What structure can form because of a deletion mutat