Cells
How many new cells does a body produce each day?
2 trillion
How many chromosomes are in a human?
46
What are highly coiled DNA molecules associated with proteins?
Chromosomes
Which feature helps scientists match homologous chromosomes?
banding pattern
Which part of the cell cycle is growth?
G1
Why are new cells needed?
for growth, repair and development
What is the term for cells growing out of control, cell cycle on overdrive and DNA mutations (checkpoints) are ignored?
Cancer
What is DNA that coils and wraps around special proteins called ________.
histones
What is a picture of every pair of homologous chromosomes within a cell, organized according to size and shape?
karyotype
Which part of the cell cycle double organelles and prepare for division?
G2
What must a cell do first in order to make new cells?
double in size
Why do human chromosomes happen in pairs?
One comes from mom and one comes from dad
What is each half of a chromosome called?
sister chromatid
In a karyotype, the chromosomes are organized in ______________.
pairs
Which part of the cell cycle is synthesis of new DNA (aka DNA Replication)?
S
How long in the DNA in each cell?
6 ft
Why might a doctor do a karyotype?
What do the two chromatids of a chromosome contain?
identical genetic information
What does it mean if there are extra or missing chromosomes in a karyotype?
there could be a chromosomal disorder
Where do one of each of the pairs of homologous chromosomes come from?
Mom and Dad
What is the repeating sequence of events that make up the life of a cell?
The Cell Cycle
What is removed during an Amniocentesis?
fluid surrounding the baby
Where do sister chromatids connect?
centromere
What are paired chromosomes with genes for the same traits arranged in the same order?
homologous chromosomes
What part of the cell cycle is cell division?
Mitosis