2. • Widow´s peak is a distinct point in the hairline in the centre of
the forehead. People who do not have a widow's peak have a hairline that
runs straight across.
• Having widow’s peak is dominant over don’t having it although there is no
real evidence of this.
Info from:
http://teach.genetics.utah.edu/content/heredity/docs/traitsreference.pdf
3. AaAa aa
aa Aa
aa Aa
aa
ME
(Aa)
Aa aa
aa Aa
People
affected
Straight
hair
DOMINANT AUTOSOMAL
HEREDITY