Which sample carries a derived X chromosome with a translocation due to ectopic crossover between the loci PRKX and PRKY: 46,X,derX,t(X,Y);   ?

Can someone explain why those values were chosen to be divided by the total? I thought it was the four smallest amounts, so I would have done 3+64+67++7/1600. Can someone explain why that would have been wrong

Shown here is PCR-based analysis of mouse pups from an experiment designed to evaluate the phenotypic impact of the sex-reversed Y chromosome gene (SRY). Interpret the data shown here clearly, defining the importance of each mouse tested and interpreting the results. Which mouse (of the three shown) is likely transgenic for Sry? Explain.

The plant Haplopappus gracilis has a 2n of 4. A diploid cellculture was established and, at premitotic S phase, aradioactive nucleotide was added and was incorporatedinto newly synthesized DNA. The cells were then removed from the radioactivity, washed, and allowed to proceed through mitosis. Radioactive chromosomes or chromatids can be detected by placing photographic emulsionon the cells; radioactive chromosomes or chromatids appeared covered with spots of silver from the emulsion.(The chromosomes “take their own photograph.”) Drawthe chromosomes at prophase and telophase of the firstand second mitotic divisions after the radioactive treatment. If they are radioactive, show it in your diagram. Ifthere are several possibilities, show them, too.

Below is a pedigree showing transmission of a disease; affected individuals are indicated by solid circles or boxes. Represented below the pedigree are two nylon membranes; DNA samples from each individual in the pedigree were spotted in identical fashion on each membrane. Each individual's DNA appears directly below his or her position in the pedigree. Each membrane was hybridized with allele specific oligonucleotides that detect the two alternative alleles of a single SNP locus (ASO 1 and ASO 2). Positive hybridization is represented as a filled circle and lack of hybridization is represented as an open circle. I 11 III IV V ASO 1 ASO 2 To 1 2 3 4 5 6 a. What is the mode of transmission of this disease? 12 b. Which SNP allele (ASO1 or ASO2) is originally linked to the disease gene? c. Draw a diagram of the event that gave rise to the genotype of individual IV-5. d. Individual V-1 is an unborn fetus. If the SNP locus is 10 CM from the disease locus, what is the likelihood that he will…

Please find the attachment

Y-STR and mtDNA tests have less impressive statistical weights than autosomal tests because.....     They undergo a mutation rate that is at least ten times greater than that of nuclear genes   There are thousands of copies of each in every cell and their information is redundant   They both contain a relatively small number of genes and all are under strong selective constraint   They are both involved in cytoplasmic inheritance and approximately 10% of individuals have been found to be chimeras   They are paternally and maternally inherited, respectfully, and there is therefor no opportunity for recombination to occur

please complete part C

Based on the table below, what is the order of the genes examined? a b с d A B C/C B A Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. A C B/B C A CAB/BAC Phenotype of testcross ССА/АСС A,C C A, B, C A B, C A, B B Genotype of hybrid gamete Abc ab C A B C Abc a B C abc е Not enough information A B C a B c # of progeny 388 5 50 64 51 47 5 390 1000