Lesson 11: The Genome Flashcards

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1
Q

what is the human genome project

A

a project that wanted to determine the complete 3 billion nitrogenous base sequence of human DNA- it started in 1990

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2
Q

which groups announced the deciphering of the human genome sequence in 2000?

A

both celera genomics and the HGP

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3
Q

what is the human genome made up of

A

3 billion base pairs; this means that about 98% of your DNA does not code for a gene so is called a non-coding or junk DNA

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4
Q

what are the parts of our DNA that don’t code for a gene called? what percent of our DNA is this?

A

98% of our DNA does not code for a gene which is called non-coding or junk DNA

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5
Q

what happens once the genome was sequenced?

A

research could then be conducted to isolate genes and determine their function

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6
Q

what is functional genomics + an example

A

when research is conducted to isolate genes and determine their function
- ex: our ability to identify genes are a sign of increased risk for diseases like cancer (product of functional genomics)

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7
Q

how does DNA identification work

A

people in labs take a blood sample, extract it, and freeze it (for a specific duration of time)

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8
Q

what tools are used during DNA identification processes

A

swabs, petri dishes, tweezers, PPE

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9
Q

benefits of DNA identification

A
  • DNA can screen for genetic disorders (ex: cystic fibrosis, huntington disease..)
  • DNA identification is personal and private
  • can possibly invent technology to bring back extinct organisms in the future by storing their DNA
  • can develop more “workable” species
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10
Q

controversies in DNA identifications

A
  • they are storing the blood of extinct animals or organism
  • scientists may use this DNA identification in the future that may bring back extinct species
  • scientists are holding an organism’s DNA for however long they want, thus leading to the potential of organisms being duplicated
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11
Q

what is DNA fingerprinting and DNA data bank and how does it work

A
  • a judge can request hair, blood, or other organic samples to help identify convicts- the info is then stored on a national DNA database, where the police can use it to help identify people
  • DNA fingerprinting uses a gel to create a pattern of bands, whih displays the characteristics of individuals
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12
Q

what is DNA fingerprinting and DNA data bank used in

A
  • commonly used in paternity cases
  • used to solve issues around ancestry/family information
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13
Q

benefits of DNA fingerprinting and DNA data bank

A

can result in less convicts being around and help police catch them to protect society from any potential crimes they may commit

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14
Q

issues or controversies surrounding DNA fingerprinting and DNA data bank

A

if the national database contains too many samples, it may increase the probability of innocent people being prosecuted for crimes they didnt commit

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15
Q

what are restriction enzymes and what are they used for

A
  • type of enzyme that has the ability to cut DNA at specific locations on the genome
  • there are multiple variations of restriction enzymes that each cut at different sites; they are like chemical scissors that can cut DNA at specific sequences
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16
Q

what is restriction enzymes a vital part in?

A

vital part in the formation of recombinant DNA

17
Q

what is restriction enzymes used for

A

used in DNA fingerprinting for forensic purposes

18
Q

what are benefits of restriction enzymes

A
  • advances in medicine and gene therapies
  • biotechnological applications for modified organisms
  • crucial in forensic science for DNA identification
19
Q

issues/controversies surrounding restriction enzymes

A
  • the process of restriction enzymes (cutting DNA) can be easily affected by temperature, composition, and concentration of buffers and other chemicals
  • there is controversy around recombinant DNA as there are people arguing that manipulating DNA goes against the code of life
20
Q

what is spider silk and what can it be used for

A

spider silk is strong, waterproof, and stretchy- it can be used to manufacture things like biomaterials for the aerospace industry, strings for tennis rackets, etc.

21
Q

benefits of spider silk

A
  • the silk stretches about 30% more than any elastic nylon
  • the spider silk gene has been isolated and inserted into the goat genome; as a result, the goats produce spider silk protein in their milk which can be purified for materials
22
Q

controversies surrounding spider silk

A
  • there aren’t any major controversies, but the process of genetically modifying goats and using their milk to replicate it could be controversial and unethical
23
Q

what is bt corn and how does it work (what does it help with)

A

bt corn is a genetically modified food; the use of recombinant DNA technology helps make food less susceptible to rotting- it enhances nutritional value and helps make crops resistant to pests and herbicides

24
Q

what is “BT” from BT corn? what does it do

A

bacillus thuringiensis (BT) is a bacterium found in soil; it produces a natural pesticide of crystal proteins that kill certain insects
- the genes in the proteins have been inserted into many plants like corn through the use of DNA technology

25
Q

issues/controversies with BT corn

A
  • concerns with new allergic responses when producing food with built-in natural pesticide
  • if farmers switch to this new GM variety, the genetic diversity of corn will be lower
  • there is a fear of what happens if/when the BT gene would ever escape into wild plant populations
26
Q

some benefits of BT corn

A

DNA recombinant provides for the BT corn to be able to produce on its own pesticides against insects such as the european corn borer
- pesticides reduce the need to spray crops with synthetic pesticides and as they may be health hazards and produce runoff that contaminates lakes, rivers, and groundwater