Module 2 Lab Karyotyping Flashcards
occassionally, ___ is lost or rearranged during the formation of gametes or during cell division
chromosomal
cause of chromsome being lost during formation of gametes or cell division
nondisjunction
translocation
it is estimated that one in ___ live births have some kind of chromosomal abnormality
156
some of the abnormalities associated with chromosome structure and number can be detected by a test called ___
karyotype
can show prospective parents whether they have certain abnormalities that could be passed on to their offspring
karyotypes
karyotypes can also reveal the gender of a fetus or test for certain defects through the examination of cells from ____
uterine fluid
examination of uterine fluid for karyotyping
amniocentesis
to create a karyotype, chromosomes are what
stained and photograph
homologous pairs are arranged in order by ___
size
samples for karyotyping must be
any cell undergoing mitosis
preferable cell stage for karyotping
metaphase
A chromosome whose centromere is centrally located
metacentric
Metacentric chromosomes are created because of ___, instead of longitudinal, division of the centromere during mitosis
transvers
Among human chromosomes which are classified as metacentric
1,3,16,19 and 20
are mainly characterized by the centrosome positioned off-center
submetacentric
). Pairs manifesting submetacentric formation are
2,4,5,6,7,8,9,10,11,12,17,18 and X chromosome
A type of chromosome that has its centromere near one end, producing a long arm (q arm) and a very short arm (p arm).
acrocentric
pairs of acrocentric chromosomes in humans
13, 14,15,21
A telocentric chromosome is a type of chromosome where the centromere is located at or very close to the end, resulting in only one visible arm
telocentric
is a genetic test that identifies anomalies in chromosomes, which helps in diagnosing various diseases and disorders.
karyotyping
Abnormal karyotyping results can indicate genetic syndromes like
down syndrome
klinefelter syndrome
turner syndrome
group consist of six longest chromosomes, centromeres in center
Group A
consist of four long chromosomes with centromeres away from center
B
consist of 14 medium length chromosomes with centromeres slightly off-center
C