Question

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1. In the analysis of bacteriophage T4 rll locus mutants, a mixed infection experiment was eonducted. Complementation was ebierved for mutants 1 and 2, as well as for mutants 2 and 3 but mot between and 3. What can be concluded from the results? A-mutations 1 and 3 are on dferent genes B-all 3 mutations are in separate genes C-mutations 1 and 3 are in the same gene; mutation 2 is in a different gene than both D- mutations 1 and 2 are in the same gene; mutation 3 is in a different gene than both 2. for inversion heterorygotes, if crossing over occurs within a pericentric inversion, which of the folowing wil resut? A-there will be no abnormal centromeres and no duplications or deletions 8-the altermate segregation pattern will resut yielding duplications and deletions in the gametes C both acentric an dicentric chromatids will result containing deletions and duplications o-there will be no abnormal centromeres bt % the gametes wil have delications and deletions . Which of the following involves an exchange of genetic information between different chromosomes A-inversion B-duplication C-translocation D-deletion 4. Assume that you are told that an individual fly. Drosophila, has a single X chromosome. You are aso told that the autosomal eomplement is a normal2n You know that in humans, an individual with asingle X is female (45, X Turner Syndrome). Would you be correct in assuming that the Drosophila sex for a single X is also female A Yes, because sex determination in humans and insects is essentially the same B-No, sex determination in drosophila on the presence or absence of the Y chromosome C-No, it takes 2 Xchromosomes to product a female in humans and a Y chromosome to produce a male in Drosophila D-Yes, the presence of an X chromosome determines a female in both organisms E-No, the chromosomal baiis for sex determination in Drosophilla is based on the ration between the number of x chromosomes and haploid sets of autosomes

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Answer 1

3.C ( translocation)

4.E. ( No, the chromosome based for sex determination in drosophila based on the ration between the X chromosome and haploid set of autosomes.)