Non-Mendelian Genetics
: Students will analyze how
biological traits are passed on to
successive generations.
: Using Mendel’s laws, explain
the role of meiosis in reproductive
: What are some exceptions to
Mendelian genetics?
codominance
incomplete dominance sex-linked traits
Non-Mendelian Genetics
dominant
capital letter
different
R
W
heterozygous
Non-Mendelian Genetics
WW
RR
RW
Make a Punnett square for a cross between a white
combination
Non-Mendelian Genetics
two different
capital letters
R
W
heterozygous
WW
RR
RW
Make a Punnett square for a cross between a pink
Non-Mendelian Genetics
sex
sex-linked trait
sex
X Y
Non-Mendelian Genetics
on a sex
genes
So when we use Punnett Squares for sex-linked traits,
we always use X and Y as the alleles, but we add a
superscript
X
X
disorder so X normal
causes the disease
write Y.
Non-Mendelian Genetics
X chromosomes.
X (and one Y).
another copy
X
does not have the
