Human Pedigree Genetics - Biology Worksheet
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3Human Pedigree Genetics
Name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Lab Partner: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Period _ _ _ _ _ Date _ _ _ _ _ _ _ _ _
Purpose: To learn to analyze family pedigrees and determine the unknown genotypes of members of each family.
Procedure: Study each of the following families with certain hereditary traits. Determine whether the gene for the
trait listed is dominant or recessive and determine the genotype and phenotype of each individual in the family.
Record the genotypes on this lab.
Data:
Pedigree Chart Symbols
Sysmbol
Meaning
Parents
1
2
Male
Female
Children
Affected individule
1
2
3
4
5
6
Stillborn
Grandchildren
Fraternal twins
1
2
3
4
5
Pedigree A. Deaf Mutism
One form of deafness in humans is a type in which the individual inherits not only deafness but also the inability to
talk. Use symbols D for dominant, d for recessive.
Deaf Mutism
I
1
2
II
1
2
3
4
5
6
7
8
III
1
2
3
4
5
6
7
8
9
10
11
12
13
14
IV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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