Genetic%20pedigrees

1
Genetic pedigrees
parents
female
male
offspring
2
Genetic pedigree A
3
Genetic pedigree A explained
Parents phenotype
Affected x unaffected
?
Parents genotype
Hh
hh
Gametes
H or h
h only
Genotypes of offspring
Hh hh
Phenotypesof offspring
1 affected 1 unaffected
4
Genetic pedigree B
5
Genetic pedigree B explained1
For the first section (parents giving rise to the
first generation)
Parents phenotype
affected x unaffected
?
Parents genotype
ff
FF
Gametes
f only
F only
Genotypes of offspring
ALL Ff
Phenotypesof offspring
unaffected - carriers
6
Genetic pedigree B explained2
For the second section ( two carriers giving rise
to the second generation)
First generationphenotype
unaffected x unaffected (carrier)
(carrier)
?
First generation genotypes
Ff
Ff
Gametes
F or f
F or f
Genotypes of second generation
FF Ff Ff ff
3 unaffected 1 affected 2/3 carriers 1/3
completely unaffected
Phenotypes of second generation offspring