Download Answer key: Mendel Never Knew

Trait
Trait 1
Mode of inheritance(s)
 Codominance
 Pleiotropic
Trait 2

Incomplete
dominance
Trait 3


Polygenic
*others such as
complete
dominance
Trait 4


Trait 5



Trait 6


Polygenic
* others such as
Pleiotropic,
complete
dominance
Multiple alleles
Codominance
Complete
dominance
Pleiotropic
* others such as
complete
dominance
Description/Definition/Explanation/etc.
Homozygous (AA) individual would be “normal”
Homozygous (SS) individual would have sickle cell disease
and have many issues—joint pain, shortness of breath,
anemia, etc
Heterozygous (AS) individuals would be “normal” at sealevel; and have issues at higher elevations.
Incomplete dominance means that individuals who are
heterozygous, and therefore two different alleles, have a
phenotype that is a mixture of the two alleles. Neither allele
shows up in the offspring as the original color. For example,
“blue” (gray) results from having one black allele and one
white allele (Bb).
Polygenic means more than one pair of genes (alleles)
contribute to the phenotype…For example if human height
has three pairs of genes, an individual could have up to 6
dominant (or 6 recessive genes). This allows for more
genotypes: AABBCC, AABBcc, AABBCc, etc. As a result
there will be many more phenotypes other than an “either/or”
phenotype that would result from being a mater of one gene
pair.
See above. In addition,
OO...complete dominance; results in O type blood.
AA, AO…complete dominance; results in A type blood.
BB, BO…complete dominance; results in B type blood.
AB…Codominance; results in AB type blood.
Cartilage is found all over the body; joints, trachea, ears,
nose, etc. As a result, having both alleles be recessive causes
many problems all over the body. Individuals who are
heterozygous or homozygous dominant have no problems.