Chromosome Disorders & Genetic Outcomes
Having one extra chromosome in humans is called
Trisomy
Type of cell division in bacteria that produces two identical daughter cells
binary fission
Phase of cell growth before DNA replication
G₁
In this stage, homologous chromosomes pair and crossing over occurs
Prophase I
Having one missing chromosome in humans is called
monosomy
Period when bacterial chromosome replicates
C Period
Phase when DNA replication occurs
S Phase
Homologous pairs align in the middle of the cell
Metaphase I
Trisomy 21 causes which genetic disorder?
Down's Syndrome
Protein that forms the division ring
FtsZ
Phase of preparation for mitosis
G₂
Homologous chromosomes move to opposite poles
Anaphase I
XXY genotype results in which syndrome?
Klinefelter's syndrome
Site on bacterial DNA where replication begins
OriC or origin of replication
Checkpoint ensuring DNA was copied correctly
G₂ checkpoint
Two haploid cells form at the end of this stage
Telophase I
XO genotype results in which syndrome?
Turner's syndrome or monosomy X
Overlapping DNA replication cycles in fast-growing bacteria
Multifork Replication
Checkpoint confirming spindle fibers attach before separation
M checkpoint
Sister chromatids separate in this stage
Anaphase II