Question of the Day
Question: How are co-dominance and
incomplete dominance similar? Different?
Answer: … … …
Unit 6 Vocab Sheet
Unit 6
Vocabulary
14. polygenic trait- controlled by
two or more genes; Ex: skin
& eye color
Additive effects of 2+
genes on a trait
Seen when the trait varies
along a continuum
Polygenic:
In Labradors, the “B” gene for black/brown coat color
is turned off by the “E” gene!
Unit 6 Vocabulary
45. sex-linked trait- trait
whose gene is located on a
sex chromosome; Excolorblindness
Gene is usually
recessive & on X
chromosome
XN = normal,
Xn = colorblind
One gender will have
the trait more often
Colorblindness
Vision in Men:
Unit 6 Vocabulary
45. sex-linked trait- trait
whose gene is located on a
sex chromosome; Excolorblindness
Gene is usually
recessive & on X
chromosome
XN = normal,
Xn = colorblind
One gender will have
the trait more often
N
N
n
N
N
X X
N
n
X X
Girl, normal
Girl, carrier
N
X Y
n
XY
Boy, normal
Boy, colorblind
Unit 6 Vocabulary
42. pedigree- a diagram
showing the lineage of a
family for a particular trait
Pedigree
Example:
Polydactyly
Pedigree Practice: Addams Family
Start Homework:
- Genetics Practice Problems #25- 45
- Finish Who Gets the Money
- Finish Vocab Sheet
- Finish Addams Family Pedigree
GATTACA