They sexlinkedtraits sexlinkedtraits 1 3610

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Unformatted text preview: y
different
traits
 –  More
alleles
on
the
X
chromosome
than
on
the
Y,
meaning
that
 there
are
not
matching
alleles
on
these
two
chromosomes
 –  males
(XY)
have
only
one
copy
of
the
alleles
found
only
on
the
X
 chromosome
 Because
there
are
so
many
more
func:onal
genes
on
the
X
chromosome
 than
on
the
Y,
these
are
the
genes
usually
referred
to
when
discussing
 sex‐linked
traits
 
‐
Genes
carried
on
one
sex
chromosome
with
no
counterpart
on
the
 other
sex
chromosome
code
for
sex‐linked
traits
 Color
vision
is
one
such
allele
 –  the
gene
for
color
discrimina:on
is
on
the
X
chromosome
but
not
 the
Y
 Sex‐linked
Traits
 Sex‐linked
Traits
 1 3/6/10 The
Punne:
Square
 Gene:c
traits
can
be
 predicted
using
a
simple
 PunneN
square
 The
PunneN
square,
a
tool
 used
to
determine
the
 probability
of
genotypic
 combina:ons
in
offspring
 PunneN
c
rsquares
predict
the
 phenotype
ra>os
 Central
Dogma
 Genes
direct
the
forma:on
of
proteins
 –  DNA
controls
the
produc:on
of
proteins
 –  DNA
transcribed
to
RNA
trans...
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This note was uploaded on 10/27/2010 for the course BIOL 125 taught by Professor Klein during the Spring '10 term at CUNY Hunter.

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