A
heterozygous female
does not exhibit the
recessive
trait but is a
carrier
of the recessive allele - she can pass the allele to offspring.
If a female
carrier
mates with a normal-sighted male:
There is a 50% chance that a
daughter
will be a
carrier
like her mother.
There is a 50% chance that a
son
will have the
disorder
.
A heterozygous female does not exhibit the recessive trait but is a carrier
of the recessive allele - she can pass the allele to offspring.