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Eras
Back When
Adapt,
Evolve,
Move On
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It’s All In
The Genes
Crazy
Crossings
This is the
Longest Era
What is
Precambrian?
This Era Includes the
Mass Extinction of the
Dinosaurs
What is the
Mesozoic?
This is the most
recent era.
What is the
Cenozoic
Era?
This is when many
species become extinct
because of
environmental changes
What is a
Mass
Extinction?
This Era
Includes the
Evolution of
Humans.
What is the
Cenozoic
Era?
These give
evidence that
an organism
lived long ago
What are
fossils?
This process in which
biological change occurs
over time and
descendants differ from
their ancestor
What is
Evolution?
All of the alleles of a
Bob Bird population
are part of this.
What is a gene
pool?
A body structure in a
present day organism that
no longer serves its
original purpose, but was
used by its ancestors
What are
vestigial
structures?
This is a change in
allele frequency due to
chance
Genetic
Drift?
Fossil evidence suggests that a
number of members of one fish
species from an ancient lake in Death
Valley, California, became several
isolated species. Each of these new
species lived in a different pond. This
kind of speciation is shown in this
situation
What is
Geographic
Isolation?
The picture to
the left shows
fossils found
in rock layers.
This fossil is
the oldest
What is
organism A?
This type of allele is
caused by a lethal
mutation.
What is a
lethal allele?
In jaba fish, a recessive allele (a)
codes for a condition that always
causes offspring to die before
they hatch. This is how this
recessive allele stays in the gene
pool.
(Give the parents genotype!)
What is heterozygous
individuals or
carriers?
Aa and Aa
This can increase
an organisms
chance of survival
in a changing
environment
What is
Variation?
These are two cells
produced in meiosis.
What are
sperm and
egg?
Sponge Bob has 32
chromosomes in their
body cells. This is how
many chromosomes
would be in Sponge
Bob’s sperm cell.
What is 16
Chromosomes?
There are 22
chromosomes in the
gametes of Easter Bunny.
How many chromosomes
would be in the somatic
cells of this Bunny?
What is 44
Chromosomes?
In the Kingdom of Far, Far
Away, donkeys can either talk
or not talk. Allele D is
expressed as not talking, while
allele d is expressed as
talking. These are the
possible genotypes for a
non-talking donkey.
What is DD
and Dd?
In the Kingdom of Far, Far Away,
donkeys can either talk or not talk.
Allele D is expressed as not
talking, while allele d is expressed
as talking. When two
heterozygous donkeys mate, this is
the chance that their offspring that
will be able to talk.
What is 25%?
This is the name given to
this process in which parts
of the chromosomes are
exchanged during
meiosis.
What is a
crossing over?
These are the
two sex
chromosomes in
a male.
What is
X and Y?
In a Ogre, G codes for a green
colored ogre and g codes for a
purple colored ogre. F codes for a
fat ogre and f codes for a skinny
ogre. If an ogre has a genotype of
GgFf, these are the four possible
genetic combinations that could be
present in a a female ogre’s
unfertilized egg.
What are
GF, Gf, gF,
and gf?
Meiosis and sexual
reproduction lead to
more genetic variation
and recombination.
This is why variation is
important.
What is Helping an
Organism Survive a
Environmental
Change ?
This is why recessive
X-linked traits tend
to be expressed more
commonly in males
What is Only
One X
Chromosome?