Sheryl A. DeCaprio
Label the pedigree chart with the information given. Can you determine if:
-
1) the ability to curl one’s tongue is dominant or recessive,
-
2) having a widow’s peak is dominant or recessive, 3 deduce as many genotypes of individuals as possible.
Place a ‘-’ when it is not possible to accurately determine the genotype.
Hint
: Test
one
trait at a time, then determine the genotype of the individual. Use Punnett squares to test your hypothesis. Do the percentages match the actual data/
Individual
|
Trait
|
Il, II4, III7
|
curls tongue, has a widow’s peak
|
IIi, 3 III6,8
|
curls tongue, no widow’s peak
|
112, 6 III3
|
does not curl tongue, has a widow’s peak
|
I2. II5,7
|
does not curl tongue,
|
III1,2,4,5
|
no widow’s peak
|
Label and fill in the pedigree chart
(figure available in print form)