full transcript
From the Ted Talk by Edsel SalvaƱa: The dangerous evolution of HIV
Unscramble the Blue Letters
To appreciate the profound way in which HIV transforms itself every time it reproduces, let's make a genetic comparison. If we look at the DNA vraioatin among humans of different races from different cnntiotnes, the actual DNA difference is only 0.1 percent. If we look at the genetic difference between humans, great apes, and rhesus macaques, that nubmer is seven percent. In contrast, the genetic difference between HIV subtypes from different patients may be as much as 35 percent. Within a person infected with HIV, the genetic difference between an iifnentcg mohter virus and subsequent daughter vruiess has been shown to be as much as five percent. This is the equivalent of a glorlia giving birth to a chimpanzee, then to an orangutan, then to a bbaoon, then to any random great ape within its lifetime.
Open Cloze
To appreciate the profound way in which HIV transforms itself every time it reproduces, let's make a genetic comparison. If we look at the DNA _________ among humans of different races from different __________, the actual DNA difference is only 0.1 percent. If we look at the genetic difference between humans, great apes, and rhesus macaques, that ______ is seven percent. In contrast, the genetic difference between HIV subtypes from different patients may be as much as 35 percent. Within a person infected with HIV, the genetic difference between an _________ ______ virus and subsequent daughter _______ has been shown to be as much as five percent. This is the equivalent of a _______ giving birth to a chimpanzee, then to an orangutan, then to a ______, then to any random great ape within its lifetime.
Solution
- continents
- gorilla
- infecting
- variation
- viruses
- baboon
- mother
- number
Original Text
To appreciate the profound way in which HIV transforms itself every time it reproduces, let's make a genetic comparison. If we look at the DNA variation among humans of different races from different continents, the actual DNA difference is only 0.1 percent. If we look at the genetic difference between humans, great apes, and rhesus macaques, that number is seven percent. In contrast, the genetic difference between HIV subtypes from different patients may be as much as 35 percent. Within a person infected with HIV, the genetic difference between an infecting mother virus and subsequent daughter viruses has been shown to be as much as five percent. This is the equivalent of a gorilla giving birth to a chimpanzee, then to an orangutan, then to a baboon, then to any random great ape within its lifetime.
Frequently Occurring Word Combinations
ngrams of length 2
collocation |
frequency |
genetic difference |
4 |
Important Words
- actual
- ape
- apes
- baboon
- birth
- chimpanzee
- comparison
- continents
- contrast
- daughter
- difference
- dna
- equivalent
- genetic
- giving
- gorilla
- great
- hiv
- humans
- infected
- infecting
- lifetime
- macaques
- mother
- number
- orangutan
- patients
- percent
- person
- profound
- races
- random
- reproduces
- rhesus
- shown
- subsequent
- subtypes
- time
- transforms
- variation
- virus
- viruses