Transcript HB B EXAM ReviewJeopardy

DNA
Reproduction/Meiosis
and Development
Genetics
Biotech/
Change over time
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Cell Cycle
A cell with 8 chromosomes
before the beginning of the cell
cycle will produce new cells that
have
8
A scientist was collecting data about the
number of chromosomes that a certain
organism had. Most of the skin cells that
he examined had a certain amount of
chromosomal material, but he found
some skin cells with double the
chromosomal material. What might be
the explanation for these findings?
Some skin cells were in the G2
phase and DNA was replicated.
In mitosis, separation of sister
chromatids occurs during
anaphase.
Cyclins regulate progression
through the cell cycle by
activating kinases
• List 3 reasons that Cancer
cells are cancerous
mutations in tumor-suppressor
genes.
mutations in proto-oncogenes.
uncontrollable cell division.
Unlike DNA, RNA contains
uracil
The function of tRNA molecules is to
transport amino acids to mRNA
Which type(s) of RNA is(are)
involved in protein synthesis?
messenger RNA, ribosomal
RNA, and transfer RNA
Why is the RNA in the cytosol
much smaller than the RNA in
the nucleus?
Noncoding regions of RNA are
removed in the nucleus.
What happens during the process
of translation?
The cell uses information from
messenger RNA to produce
proteins.
The heart and blood vessels form
from this (these) tissue layer(s).
mesoderm
What change happens to
chromosome number during
fertilization?
a change from haploid to diploid
In a normal body cell of a dogfish
shark, there are 24 chromosomes.
How many chromosomes are
found in each of its gametes?
12
the cell labeled X in Figure 10-9
containing 4 chromosomes. Which of
the four cells below it represents a
healthy gamete that could be
produced from this cell?
A
During which phase of meiosis do
homologous pairs of chromosomes
line up next to one another along the
equator?
metaphase I
A coin is tossed three times. The
probability that it will land heads
up all three times is
1/8
Organisms that have two
identical alleles for a particular
trait are said to be
homozygous
The failure of chromosomes to
separate during meiosis is called
nondisjunction
What principle states that during
gamete formation genes for
different traits separate without
influencing each other’s
inheritance?
principle of independent
assortment
Colorblindness is more common
in males than in females because
the allele for colorblindness is
recessive and located on the X
chromosome
Certain segments of DNA are
more likely to move from one
area of a chromosome to another.
These segments are called
transposons
The purpose of gene therapy is to
cure genetic disorders
Earth’s atmosphere probably
originated
from volcanic gases
List 3 explanations for the first
organic molecules
Gases reacted with energy like
lightning.
From meteorites
From hydro thermal vents
The surface of Earth 4.6 billion years
ago would have been hostile to
modern life list 3.
temperatures were extremely
high.
atmosphere was rich in carbon
dioxide.
tremendous amounts of
ultraviolet radiation.