Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
How many genes are there in the human genome?
|
25,000
|
|
|
What is the structure formed when DNA is wraped around histones?
|
Nucleosomes
|
|
|
Each gene is inherited in two copies
|
Alleles
|
|
|
The short arm
|
P
|
|
|
The long arm
|
Q
|
|
|
The 2 chromatids attached to a single centromere of a chromosome after DNA replication has occurred
|
Sister Chromatid
|
|
|
Ends of chromosome capped with?
|
3-20 kb of TTAGGG repeats
|
|
|
TAR (telomere associated repeats)
|
Not used for FISH probes because these are shared among subsets of human chromosomes
|
|
|
What is now used for FISH?
|
Unique DNA
|
|
|
-The primary constriction of the chromosome
-seen only when chromosomes are condensed -Contains alpha satellite DNA -Used as a center of movement of the chromosome during mitosis & meiosis |
Centromere
|
|
|
The protein structure on either side of the centromere
|
Kinetochore
|
|
|
Centromere near the end of the chromosome (one arm smaller than the other)
|
Acrocentric
Stalk region has rDNA |
|
|
Centromere near the middle of the chromosome
|
Metacentric
|
|
|
Centromere nearer to one end than the other
|
Sub-metacentric
|
|
|
Lightly packed form of chromatin rich in gene structure
-G negative |
Euchromatin
|
|
|
Tightly packed form chromatin that is poor in gene concentration
|
Heterochromatin
|
|
|
The type of heterochromatin that is never transcribed
Generally G+ |
Constitutive heterochromatin
|
|
|
The type of heterochromatin that can be genetically active, but is turned off
Can be G+ or G- |
Facultative Heterochromatin
|
