This pedigree shows the inheritance of Tay-Sachs in a family. Tay-Sachs is a recessive disorder that causes cells to be unable t
o break down waste products. These wastes build up in brain cells and cause damage and eventual death.
Which numbers have the genotypes of tt?
TT = normal
Tt = carrier
tt = disease
a
1, 2, 3, 4, 6, 7, 8, 9, 12, & 13
b
5, 10, 11, & 14
c
5, 6, 7, 8, & 9
d
10, 11, 12, 13, & 14