Two genes on a Drosophila chromosome are 70 mu apart. How do you think this number was calculated, and what percentage of recombination would you expect to see between them experimentally?
What will be an ideal response?
Distances must have been calculated between these genes and other genes that are located between them. The percentage of recombination measured between genes that are over 50 mu apart will be 50%, because that is the maximum measurable.
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What is the purpose of DNA ligase in a cloning experiment?
A. The purpose is to proofread the vector for mistakes. B. The purpose is to reestablish the stable sugar-phosphate backbone of the DNA molecule C. The purpose is to allow the vector to enter into the cell. D. The purpose is to function as a selectable marker.
Approximately what proportion of the human genome is composed of the exome?
A) < 0.1% B) 2% C) 10% D) 20% E) 45%
Four of the five pairings listed below match the
correct taxonomic group and common name. Select the exception. a. Chondrichthyes: sharks b. Urochordata: lancelets c. Amphibia: toads d. Reptilia: lizards e. Osteichthyes: perch
An organism has a mutation in the gene that codes for separase so that no functional separase can be made by this individual. What consequence would occur from this mutation?
a) Sister chromatids would separate prematurely during mitosis. b) During meiosis, sister chromatids would never separate because cohesin could not be broken down but homologous chromosomes would separate. c) Both sister chromatids and homologous chromosomes would never separate because cohesin could not be broken down. d) During meiosis, homologous chromosomes would never separate during meiosis but sister chromatids would separate.