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biology year 2
biology topic 7
7.2 populations
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Pippa Baxter
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Cards (5)
what is a population
a
group
of
organisms
of the
same
species
in
one
area
at
one
time
that can
interbreed
what is a gene pool
all
the
alleles
of
all
the
genes
in a
population
at
any
one
time
what is allele frequency
proportion
of an
allele
of a
gene
in a
gene pool
(
decimal
or
percentage
)
what does the hardy-weinberg principle state and what are the conditions under which the principle applies
allele frequencies
will
not
change
from
generation
to
generation
given:
population
is
large
no
immigration
/
emigration
to
introduce
/
remove
alleles
)
no
mutations
(to
create
new
alleles
)
no
selection
for
/
against
particular
alleles
mating
is
random
what is the hardy-weinberg equation
p2
+
2pq
+
q2
=
1
and
p
+
q
=
1
p
-
frequency
of
dominant allele
of
the gene
q
-
frequency
of
recessive
allele
of the
gene
p2
-
frequency
of
homozygous
dominant
genotype
2pq
-
frequency
of
heterozygous genotype
q2
-
frequency
of
homozygous
recessive
genotype
