| Anthropoid (5) |  |
| Aquatic mammal (349) | |
| Artiodactyl (5) | |
| Bats (213) | |
| Bear (481) | |
| Camels (180) | |
| Canine (1814) | |
| Chevrotain (4) | |
| Deer (593) | |
| Edentate (148) | |
| Equine (612) | |
| Feline (1466) | |
| Giraffa (96) | |
| Hyrax (2) | |
| Insectivore (12) | |
| Lemur (186) | |
| Mammal (466) | |
| Marsupial (253) | |
| Mastodon (4) | |
| Musteline (234) | |
| Pachyderm (1335) | |
| Perissodactyla (1) | |
| Primates (1788) | |
| Prototherian (71) | |
| Rabbit (106) | |
| Raccoon (432) | |
| Rodent (1353) | |
| Ruminant (142) | |
| Tapir (31) | |
| Tarsier (6) | |
| Ungulate (12) | |
| Viverrine (47) | |
Why cattle, pigs are even-toedduring evolutionary diversification of vertebrate limbs the number of toes in even-toed ungulates such as cattle
The fossil record shows that the first primitive even-toed ungulates had legs with five toes (digits) just like modern mice and humans.
and other even-toed ungulates says Developmental Geneticist Prof. Rolf Zeller. Loss of asymmetry preceded the reduction
The identified genetic alterations affecting this regulatory switch offer unprecedented molecular insights into how the limbs of even-toed ungulates diverged from those of other mammals roughly 55 million years ago explains Rolf Zeller.
and other even-toed ungulates while it remained fully functional in some vertebrates such as mice and humans.
< Back - Next >
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011