Poldhu the fertile blue-cream-and-white male Cornish Rex from the 1950s may also have been an XY/XY chimera the main difference between Poldhu and Floid being that Poldhu had cream (dilute) instead of red (non-dilute). A good example of this is the now famous Maine Coon Solkatz Pretty Boy Floid who is a mix of red, blue and white - a colour combination impossible in a normal XY male. The physical appearance and the sexual behaviour of an XX/XY chimera depends on which structures contain which chromosomes. The three X chromosomes in the animal may contain an assortment of different colour genes (especially if the mother mated several times and the eggs were fertilized by different fathers). In an XX/XY chimera, X chromosome inactivation will occur. If an XY egg fuses with an XX egg (a male embryo fuses with a female embryo), it gives a XX/XY chimera containing some tissues/organs which are genetically female and other tissues which are genetically male. This can come about through investigation of an illness or through visual clues such as tortoiseshell coats in male cats. In mammals, chimeras are usually only identified when there is a mismatch between the chromosomal sex (XX or XY) and the genitalia. Female chimeras can be XX/XX (two fused female embryos) or XX/XY (where the XX embryo cells form the gonads, producing a cat that appears physically female). An XY/XY chimera would be fully fertile.įemale cats can also be chimeras, but they are generally only noticed if they have a "genetically impossible" mix of colours in the coat e.g. In an XY/XY chimera if one X has the O gene and the other does not then some fur will be ginger and some black because different parts of the skin originate from different eggs! It could also be a mix of any other colours found in male cats e.g. If the two fertilized eggs are both XY, this gives an XY/XY male chimera. Until comparatively recently it was believed that chimeras were usually only produced in the laboratory and were extremely rare in nature, but it appears that chimerism is relatively common in animals that bear multiple offspring.Ī chimera is the result of 2 fertilised eggs fusing to become a single kitten. Only a few tortie tomcats were XXY (Klinefelter) individuals, and these generally had unusual conformation as well as tortoiseshell or calico patterns. The second most common cause was somatic mutation (mutation in tissue cells). Karyotype testing of male tortoiseshell cats found that most common causes of tortoiseshell tomcats was mosaicism, or chimerism, being XX/XY in all or some tissues. Because sex-linked orange and the X-inactivation process were well-known, tortoiseshell male cats were suspected to have chromosomal abnormalities, particularly in the sex chromosomes. If the Chimera dies, a creature swallowed can escape using 5 feet of movement.By the end of the 20th century, karyotype (chromosome) and genetic testing had become common methods to determine if a cat with ambiguous genitalia or fertility issues had a chromosomal abnormality. If the Chimera takes 20 damage in a single turn from a creature inside it, it regurgitates all creatures swallowed into a random space 10ft in front of it. The creature is then blinded and restrained and takes 1d8 acid damage at the start of each of its turns. Swallow Whole- A Small or smaller creature restrained by the Chimera that is hit by its Bite attack is swallowed. The Chimera regenerates 1d4-2 tentacles per day. Each tentacle has an 13 AC (natural armor) and 15 HP. The Chimera can restrain as many creatures as it has tentacles (starts with 4). Tentacle- +7 to hit, reach 10ft, 2d6+3 bludgeoning damage and a large or smaller target makes a DC 15 STR save or be restrained. DC 14 CON save against poison, additional 1d6 poison damageīite (Dolphin)- +7 to hit, 1d4+4 piercing damageīite (Anglerfish)- +7 to hit, 1d10+4 piercing damage Multiattack- The Chimera makes two bite attacks and one with its tentaclesīite (Moray)- +7 to hit, reach 10ft, 1d8+4 piercing. The Chimera is immune to this effect and sees normally within the cloud. The area is heavily obscured as with the fog spell. Once the save is successful the creature is immune to this effect until it is cast again. Creatures that start their turn or enter the area must make the save. Ink Cloud (recharge 6)- The Chimera sprays a blinding cloud of ink in a 20ft radius, all creatures inside must make a DC 16 CON save or be blinded and take 1d6 poison damage. Multiple Heads- The Chimera has advantage on perception checks (sight) and on saves against being blindedĮcholocation- The Chimera loses its Blindsight if it is deafened or silencedĭazzling Lure (2/day)- As a bonus action the chimera can use its anglerfish lure to dazzle an enemy, DC 15 WIS save or be stunned for one round
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