Eggene1isrequiredforgrowthand

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Unformatted text preview: function
allele
 
 3. +/m
=
intermediate
phenotype

incompletely
dominant
 
 
 
 Mendelian
Genetics
&
Gene
Interactions
 
 Analyzing
the
ratio
of
phenotypes
in
the
F2
generation
in
a
cross
between
two
mutants
can
 give
you
information
about
the
underlying
genes
and
alleles.
The
results
can
be
interpreted
 as
follows:
 
 3:1
phenotypic
ratio

One
gene
involved;
two
alleles
of
the
same
gene.
The
allele
giving
 rise
to
the
3x
phenotype
is
dominant.
(e.g.
alleles
of
albino
gene
in
mice
determine
fur
 color)
 
 9:3:3:1
phenotypic
ratio

Two
genes
involved;
no
gene
interaction.
(e.g.
pea
shape
vs.
pea
 color)
 
 9:7
phenotypic
ratio

Two
genes
involved;
no
epistasis.
Genes
are
in
same
pathway...
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This note was uploaded on 04/05/2010 for the course MCB 104 taught by Professor Urnov during the Spring '09 term at University of California, Berkeley.

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