BIO 320 EXAM 2 BONUS
Recorded maximum/minimum # of chromosomes identified
and species/common name associated with it. - CORRECT
REPLY>>>>>>-- Highest = (Ophioglossum reticulatum (a
fern)) is 2n = 1262 (631 pairs).
- Lowest = (Nematode Parascaris equorum univalens = germ
cells 1 chromosome (somatic cells have many small
chromosomes)
- Myrmecia pilosula Jack Jumper Ant (Australia)) are males 1
chromosome (workers 2 chromosomes)
- Mammalian karyotypes are Indian muntjacdeer (2m =6/7)
and Red viscacharat (2n = 102).
How can XIST be used in a trisomy 21 case? - CORRECT
REPLY>>>>>>-It works by forming a Barr body to prevent
over-expression of X-linked genes. The insertion of XIST
demonstrated accurate addition to both Chromosome 19 and
21. When added to an extra Chromosome 21 in a cell line,
XIST triggered heterochromatin modifications and DNA
methylation to form a Barr body.
, Commercial strawberries are what kind of polyploidy? -
CORRECT REPLY>>>>>>-Commercial strawberries are
octoploid (8n) and bear larger fruits than do diploid (2n)
strawberry strains.
Fertility is decreased with what numbered polyploidy and this
can lead to seedless varieties? - CORRECT REPLY>>>>>>-
Fertility is decreased in odd-numbered polyploids (3n, 5n,
etc.) in which almost all of the resulting games are nonviable
(desirable for seedless varieties).
What inversion leads to the tobiano coat color in horses? -
CORRECT REPLY>>>>>>-Inversion 3q.
What was the syndrome we used as an example of a
deletion? Where was the deletion? - CORRECT
REPLY>>>>>>-Cri-du-chat syndrome; segmental deletion of
chromosome 5p.
Recorded maximum/minimum # of chromosomes identified
and species/common name associated with it. - CORRECT
REPLY>>>>>>-- Highest = (Ophioglossum reticulatum (a
fern)) is 2n = 1262 (631 pairs).
- Lowest = (Nematode Parascaris equorum univalens = germ
cells 1 chromosome (somatic cells have many small
chromosomes)
- Myrmecia pilosula Jack Jumper Ant (Australia)) are males 1
chromosome (workers 2 chromosomes)
- Mammalian karyotypes are Indian muntjacdeer (2m =6/7)
and Red viscacharat (2n = 102).
How can XIST be used in a trisomy 21 case? - CORRECT
REPLY>>>>>>-It works by forming a Barr body to prevent
over-expression of X-linked genes. The insertion of XIST
demonstrated accurate addition to both Chromosome 19 and
21. When added to an extra Chromosome 21 in a cell line,
XIST triggered heterochromatin modifications and DNA
methylation to form a Barr body.
, Commercial strawberries are what kind of polyploidy? -
CORRECT REPLY>>>>>>-Commercial strawberries are
octoploid (8n) and bear larger fruits than do diploid (2n)
strawberry strains.
Fertility is decreased with what numbered polyploidy and this
can lead to seedless varieties? - CORRECT REPLY>>>>>>-
Fertility is decreased in odd-numbered polyploids (3n, 5n,
etc.) in which almost all of the resulting games are nonviable
(desirable for seedless varieties).
What inversion leads to the tobiano coat color in horses? -
CORRECT REPLY>>>>>>-Inversion 3q.
What was the syndrome we used as an example of a
deletion? Where was the deletion? - CORRECT
REPLY>>>>>>-Cri-du-chat syndrome; segmental deletion of
chromosome 5p.
