BI226 Lecture Notes - Lecture 51: Str Analysis
Get access
Related Documents
Related Questions
1. What are the advantages of Y-chromosome STR profiling? Select the two correct answers.
Less genetic variability exists on the Y chromosome than on autosomal chromosomes.
Y chromosome STR profiling is possible for more than 200 loci.
Gender separation of mixed tissue sample is easily achieved.
Y chromosome STR profiling is more sensitive than standard STR profiling.
2. What are the limitations of this procedure?
Y chromosome doesn't undergo recombination, thus it is difficult to differentiate DNA from close male relatives. | |||||||||
STRs are longer on the Y chromosomes, which leads to less efficient amplification of DNA. | |||||||||
Y chromosome DNA is hypermetilated, thus it is more difficult to amplify. | |||||||||
Sperm cells do not always contain Y chromosome, therefore sometimes semen cannot be matched with the suspect. 3. Choose the correct description of capillary electrophoresis.
What are the applications of this technique? Select the three correct answers.
|
You have been chosen to join a team of scientists investigating the arrival of a space probe from an unknown planet. The denizens of this planet sent along some representative organisms. Genetic studies reveal that one of the organisms has three separate sets of DNA. Explain these findings in light of your knowledge of genetics.
a
This organism is may have evolved three sets of DNA through endosymbiotic events much like plants did to have nuclear, mitochondrial, and chloroplast DNAs. |
b | This organism is not likely to be aneuploid because all members of its species also have three sets of chromosomes |
c | This organism could be a polyploid but only if all three sets or DNA consist of homologous chromosomes. |
d | All of the above are good explanations of these findings. |