Genetics of Hairless Rats by Debbi J. Needham
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Copyright D. Needham: 2000 - 2010. Please safeguard intellectual property by citing author and source.
| Genetics of Hairless Rats by Debbi J. Needham 2010 Repost - Original 2002 |
OFR Rosebud, Pink-eyed Hairless.
Hairless: These are a few alleles that can combine to make
hairless rats. They have no hair on their body and tightly curled
whiskers, if any. They can be any color or marking. They can have
dumbo ears or standard. They can be born naked and stay that way
or born fuzzier and shed out all of their hair.
There are lines of hairless rat that have lowered immune systems
and can become ill easily. The does have trouble lactating, thus
many hairless does will eat their litter or abandon it right after birth.
Males can be bred to does carrying a hairless gene to produce a
litter with healthier hairless rat
hairless rats. They have no hair on their body and tightly curled
whiskers, if any. They can be any color or marking. They can have
dumbo ears or standard. They can be born naked and stay that way
or born fuzzier and shed out all of their hair.
There are lines of hairless rat that have lowered immune systems
and can become ill easily. The does have trouble lactating, thus
many hairless does will eat their litter or abandon it right after birth.
Males can be bred to does carrying a hairless gene to produce a
litter with healthier hairless rat
OFR Roswell, Pink-eyed True Hairless.
Double Rex (ReRe):These rats have a totally different
genetic make-up that true hairless rats or nudes, thus they do not
produce hairless rats if bred with them.
They are born from two rex coated rats or double rex rats so they
have inhereted two rex genes (homozygous rex).They usually have
fuzz on their head and tail base and on their ankles. Occasionally,
they will grow fuzz over their body and lose it. They can be bred with
velveteen rats and rex rats to get produce double rex offspring. If
bred to a standard rat, they will have rex coated babies. They do not
have the lactation or mothering problems of the true hairless rats.
genetic make-up that true hairless rats or nudes, thus they do not
produce hairless rats if bred with them.
They are born from two rex coated rats or double rex rats so they
have inhereted two rex genes (homozygous rex).They usually have
fuzz on their head and tail base and on their ankles. Occasionally,
they will grow fuzz over their body and lose it. They can be bred with
velveteen rats and rex rats to get produce double rex offspring. If
bred to a standard rat, they will have rex coated babies. They do not
have the lactation or mothering problems of the true hairless rats.
OFR Guinivere, Chocolate Double Rex.
Double Velveteen (CuCu):Bald patches come
and go over the neck and backs of these rats. Generally, the coat
consists of short, soft crew-cut like hair that appears to break off, in
areas, causing baldness over the neck and shoulders and over the
rump. The fuzz may grow back and fall out periodically. These rats
will produce 100% velveteen offspring if bred to a standard rat. This
gene pairing does not affect lactation or rearing.
and go over the neck and backs of these rats. Generally, the coat
consists of short, soft crew-cut like hair that appears to break off, in
areas, causing baldness over the neck and shoulders and over the
rump. The fuzz may grow back and fall out periodically. These rats
will produce 100% velveteen offspring if bred to a standard rat. This
gene pairing does not affect lactation or rearing.
Double Velveteen/Double Rex
(CuCuReRe):The balding is more severe in these rats with
patches of hair falling out over the back, neck and sides, but then
growing back into fuzz and falling out again. The hairless or bald
patches seem to wander over the back, not consistanly falling out
or breaking off in the same areas consistantly. These rats have no
trouble with lactation or nursing. If bred to standard rats, a
veleteen/rex fur type will appear on the rat. This is a shorter softer
fur with little or no balding or patchiness.
(CuCuReRe):The balding is more severe in these rats with
patches of hair falling out over the back, neck and sides, but then
growing back into fuzz and falling out again. The hairless or bald
patches seem to wander over the back, not consistanly falling out
or breaking off in the same areas consistantly. These rats have no
trouble with lactation or nursing. If bred to standard rats, a
veleteen/rex fur type will appear on the rat. This is a shorter softer
fur with little or no balding or patchiness.