DNA Structure
a term used to describe the physical structure of DNA
What is a double helix ladder?
The nucleotide that binds with adenine
What is thymine?
the ability of adults to digest the lactose in milk
What is lactase persistence?
True or False: Kanna's brother can digest milk because he has a different code in his lactase gene then Kanna and her mother
False, every mammal has the same code in their lactase gene, since they can make lactase as babies
What does the DNA ladder consist of
the 4 main bases
A nucleotide that binds with guanine
What is cytosine?
True or False: The majority of the world is lactase persistent into adulthood
False, The majority of the world is lactose intolerant as adults
The person that we have studied that is Lactase Persistent into adulthood
Alissa
the section of DNA which codes (gives instructions) for a protein
What is a gene?
A DNA a strand that is made up of 20% Guanine will have this much Cytosine
20%
True or False: Lactase persistence is caused by a mutation in the DNA
True: The DNA code upstream from the gene is changed, and one single letter is switched out keeping the regulatory function to the "on switch"
The code that Alissa has in her non-coding DNA sequence that keeps the lactase gene on
ACT
The other 99% percent of DNA is said to have regulatory functions
A DNA a strand that is made up of 30% Thymine will have this much Adenine
30%
The part of DNA which regulates whether or not lactase is produced
The location in the body where Kanna's cells are not producing and releasing lactase
Small Intestines
Any change in the DNA sequence of a cell. Example: A nucleotide letter is switched out for another letter
What is a mutation?
What are considered the building blocks of life and are needed to create proteins?
Amino acids
The two products that are able to be absorbed into the bloodstream when lactase breaks down lactose
(Must get both)
What are Glucose & Galactose?
How has learning about Kanna helped us to learn how organisms evolve over time?
Kanna is lactose intolerant which means she doesn't contain the mutation for lactase persistence. She is also from Japan where this mutation over time was not advantageous because the portion of the world didn't rely heavily on milk as a food source.