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Biology
Inheritance
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Genetic diversity
The
number
of
different
alleles
of
genes
in a
population.
Natural selection results in species that are better
adapted
to their
environment
Phylogenetic system
Allows for us to see
evolutionary
relationships
Genetic diversity
The
number
of
different alleles
of
genes
in a
population.
Factor allowing
natural
selection
to
occur
Directional selection
Environment against
an
extreme
of an
allele.
Stabilising selection
Environment against
both
extremes.
Same species if they are able to produce
fertile
offspring
Same number
of
chromosomes
Can form
homologous pairs
Meosis
can occur.
Courtship behaviour
Necessary precursor
to
successful mating
Role
in
species recognition.
Phylogenetic classification system
Arrange
species
based on their
evolutionary
origins
and
relationships.
Hierarchy
which
smaller
groups
are placed
within
larger
groups,
with
no
overlap
between
groups
Each group is called a
Taxon
(
plural taxa
)
Species richness
Measure
of the
number
of
different
species
in a
community.
Index of diversity
Describes
relationship
between the
number
of
species
in a
community
and the
number
of
individuals
in
each species.
Farming techniques
reduce
biodiversity.
Genetic diversity can be made by comparing
Frequency
of
measurable
or
observable
characteristics
Base sequence
of
DNA
Base sequence
of
mRNA
Amino
acid
sequence
of the
proteins
encoded by DNA and mRNA.
Quantitative investigations of variation within a species involve:
Collecting data
from
random samples
Calculating
a
mean value
of the
collected data
and
standard deviation
of that
mean
Interpreting mean values
and their
standard deviations
Spearman’s Rank
Used to find
strength
of
correlation
between
two sets of continuous data
T-test
Find the
difference
between
means
Chi-squared test
Used to
compare
separate categories
,
discontinuous data.
Index of diversity
Measures abundance of each species.
Data collection
Method of selecting sampling sites at random
Use of quadrant
Identify species up close.