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Polycephaly. Polycephaly is the condition of having more than one head. The term is derived from the Greek stems poly (Greek: "πολύ") meaning "many" and kephalē (Greek: "κεφαλή") meaning "head". A polycephalic organism may be thought of as one being with a supernumerary body part, or as two or more beings with a shared body.
The other infant was born with duplication of the upper and lower jaw, two tongues arising from the same base, cleft palate, a slightly divided tip of the nose, and two widely spaced eyes, as well as absence of the corpus callosum, duplication of the pituitary gland and stalk, and abnormalities in the midbrain. Because they were born with a ...
Compound heterozygosity. In medical genetics, compound heterozygosity is the condition of having two or more heterogeneous recessive alleles at a particular locus that can cause genetic disease in a heterozygous state; that is, an organism is a compound heterozygote when it has two recessive alleles for the same gene, but with those two alleles ...
Of the different Grimm, the amphisbaena appears to be the King Taijitu, a two-headed snake or serpent. The king's name references the taijitu, a symbol or diagram in Chinese philosophy representing Taiji in both its monist and dualist aspects. The Grimm's coloration visually symbolizes the taijitu, with one head and body section black and the ...
In 2016, two studies reported that limb loss in snakes is associated with DNA mutations in the Zone of Polarizing Activity Regulatory Sequence (ZRS), a regulatory region of the sonic hedgehog gene which is critically required for limb development. More advanced snakes have no remnants of limbs, but basal snakes such as pythons and boas do have ...
California kingsnake. The California kingsnake (Lampropeltis californiae) is a nonvenomous colubrid snake endemic to the western United States and northern Mexico, and is found in a variety of habitats. Due to ease of care and a wide range of color variations, the California kingsnake is one of the most popular snakes in captivity.
Micrelaps. Boettger, 1880. Synonyms. Elaposchema. Mocquard, 1888 [1] Common names: two-headed snakes. Micrelaps is a genus of rear-fanged mildly venomous snakes. It is the only genus in the family Micrelapidae. The genus is native to Africa and the Middle East, and there are four species that are recognized as being valid.
Craniopagus parasiticus is an extremely rare type of parasitic twinning occurring in about 4 to 6 of 10,000,000 births. [1] In craniopagus parasiticus, a parasitic twin head with an undeveloped body is attached to the head of a developed twin. Fewer than a dozen cases of this type of conjoined twin have been documented in literature.