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;
28 Cards in this Set
- Front
- Back
|
Why didn’t most scientist initially believe that chromosomes were responsible for inheritance? |
Because there we so few chromosomes. They didnt see how they could make millions of different possibilities. |
|
|
Not all traits on a chromosome are linked together because of
|
crossing over
|
|
|
If A and B are linked then the AB and ab the possible genotypes would be a __/__ split of __ and __
|
AB ab and 50 50
|
|
|
If they are unlinked then the genotype breakdown would be
|
Ab, AB, aB, ab 25% of each
|
|
|
___show the relative distance between genes.
|
recombination frequency
|
|
|
The two types of chromosomal abnormalities are based on
|
chromosome number and chromosomal structure
|
|
|
__is a picture of all of the chromosomes a person has
|
caryotype
|
|
|
Chromosomes are numbered based on their
|
height
|
|
|
are actually out of order.
|
21 and 22
|
|
|
1.
in meiosis causes disorders in chromosome number |
nondisjunction
|
|
|
Define Euploid
|
having the correct number of each chromosome. |
|
|
Define Anaploid
|
dont have the correct number of each chromosome |
|
|
Define Monosomy
|
1 of each chromosome, fail to develop |
|
|
Define Trisomy
|
3 of the same chromosome, can live
|
|
|
Trisomy 13 called
|
patosyndrome
|
|
|
Trisomy 18 called
|
edward syndrome
|
|
|
Trisomy 21 called
|
downsyndrome
|
|
|
Sex chromosome __
cause an incorrect number of chromosome __ to be inherited. |
nondisjunction and x
|
|
|
Inactive X chromosomes are called
|
barr bodies
|
|
|
Klinefelter Syndrome means a person has what chromosome abnormality? |
2x and one y
|
|
|
Turner’s Syndrome means a person has what chromosome abnormality? |
Girl only has one x, looks less feminine, reduces fertility.
|
|
|
Triplo-X means a person has what chromosome abnormality? |
Girl can have 3 x’s. Reduces your fertility. |
|
|
Chromosome duplications occur when
|
Duplicates part of the dna that isnt supposed to be there.
|
|
|
Chromosome deletions occur when
|
Removes some of the dna.
|
|
|
Inversions occur when |
Section of the dna gets flipped. |
|
|
Pericentric inversions are
|
includes the centromere
|
|
|
Paracentric inversions are
|
on one side of the centromere
|
|
|
Translocations are when a
|
part of the chromosome goes somewhere else, relocation to a different number chromosome. can be genetic
|
