Why Study Medical Genetics Flashcards
What is the goal of the human genome project
Determine the sequence is a chemical base pairs which make up DNA
What is a genome
All the DNA in an organism
What are the four types of genetic disease disorders
Chromosome, single gene, multi factorial, mitochondria
What do all genetic diseases involve?
Cellular defects
What is chromatin
A combination of DNA and histones that gives the nucleus a granular appearance
What are chromosomes
Condensed chromatin that form dark staining bodies
What are genes
The basic unit of inheritance made of DNA that provide the blueprint for all proteins in the body
Transcription in a nutshell
RNA is synthesized from a DNA template by RNA polymerase. This forms mRNA
Where does transcription occur
Nucleus
Where does translation occur
Cytoplasm
Where are introns spliced out at in the cell
Nucleus
Translation in a nutshell
RNA synthesizes a polypeptide by interacting with tRNA
Is the codon or anti-codon on the tRNA
Anti-codon
Is the codon or anti-codon on the mRNA
Codon
Our purines double or single carbon nitrogen ringed
Double
What is the key to accurate DNA replication
Complementary base pairing
What Does the uracil replace in RNA
Thymine
What are the three stop codons
UAA, UGA, UAG
What do housekeeping genes do
Encode products that are required for some maintenance and metabolism
What must you have in order to go from DNA to mRNA
Transcription factors
What are DNA binding motifs
Configurations that allow the transcription factor to buy into a unique portion of the DNA helix
Because mRNA cannot bind directly to amino acids what do you need?
TRNA
And tRNA what are on the two opposite ends
Attachment for covalent bond and a three prime end and anti-codon on the other end
What does rRNA do
Find mRNA and tRNA to the ribosome
What are post translational modification’s
Chemical changes that occur shortly after proteins are translated
What is a karyotype
Ordered display of chromosomes; number and type of chromosomes present in an individual
What is a karyogram
Printed display of chromosomes