DNA
Can we see DNA Strands?
DNA strands are so tiny that you can see them under most microscopes. No.
B) The DNA fingerprints were made from the blood samples taken from a puppy and three possible sires in an attempt to determine the puppy's pedigree. According to the profile below, which sire is most likely the father of this puppy?
Sire B
What is the purpose of gel electrophoresis?
To separate mixtures of DNA, RNA, or proteins.
How can DNA strands be measured?
DNA strands can be measured using a tool called ¨gel electrophoresis"
C) Three men are claiming to be the father of the child of a rich heiress who died suddenly without leaving a will. They are all suing for custody of the child. A DNA sample was collected from a toothbrush that was used by the heiress. Blood samples were collected from each man and the baby. Which man is the father of the child?
Male 2
What is the purpose of restriction enzymes?
Leaves DNA at sequence-specific sites, producing DNA fragments with a known sequence at the end.
How are the DNA strands made visible to the naked eye?
By straining the sorted groups of DNA.
D) Jane was assaulted in an alley and is the victim of rape. A lab collected a sample of sperm that was found in the rape test conducted by the investigators. The police now have 3 suspects in custody =. Which of the suspects most likely raped Jane?
S1
Explain how DNA profiling has helped Forensic science over the past few decades.
DNA profiling helped Forensic science over the past few decades b/c is classifies a subject to individual evidence which can help more efficiently solve cases.
What electrical charge does DNA have?
Negative Charge.
How do short strands of DNA move as compared to long strands?
Short strands move through the holes more quickly than long strands. Shorter strands move further away than longer strands do to the starting point.