Not exact matches
If you're a carrier of a defective
gene for a recessive disorder, that means you have one
normal copy of the
gene from one of your
parents and one defective copy
from the other.
When an altered X chromosome is passed down to female offspring, Gantz reasoned, the
gene drive should convert the
normal X
from the other
parent into one with a broken yellow
gene.
The findings suggest that Turner women who receive a copy of the X chromosome
from the father (and
normal women, who get a copy
from each
parent) are more adept at social skills, although it's unclear which
genes might be at work.
«Sufferers either have a rare combination of genetic changes they inherited
from their otherwise
normal parents, or they have newly - arising changes in
genes that were not present in their
parents.»
Because the girl inherited a defective version of the
gene from each
parent, she had no
normal copy.
If one copy of one of these
genes from one
parent is already mutated at birth, the second
normal copy
from the other
parent often can compensate for the defect.
Normal cells should contain just two copies of the
gene (one copy
from each
parent), which is involved in embryo development.
On the other hand, if a dog were to inherit only one PCD
gene and a
normal one
from the other
parent, then it is possible that half of the cilia function normally and the other half doesnʼt.
The way genetics work is that a puppy inherits one colour
gene from each
parent, this means that puppies in a merle x merle litter could be
normal merles (Mm), non-merles (mm) or double merles (MM).
These dogs inherited a mutant
gene from one
parent and a
normal gene from the other
parent.
A dog with
normal patellas whose dam had luxating patellas will likely be carrying a much higher number of the
genes needed to produce luxating patellas than a dog
from two
normal parents.