For instance, in the human genome we still see the remnants of
the large olfactory receptor gene family that gave our evolutionary ancestors a keen sense of smell, even though humans no longer rely on them.
Not exact matches
The researchers identified more than 1000
olfactory receptors in the soft - shell turtle, which is one of the
largest numbers ever to be found in a non-mammalian vertebrate.
Each odor - detecting neuron (referred to as
olfactory sensory neuron from here on), chooses a single odorant
receptor gene from a fairly
large number of options that are split into class I (fish - like) and class II (terrestrial - specific) odorant
receptors.
The octopus genome contains around 1,800 C2H2 zinc finger transcription factors, the second
largest gene family so far discovered in animals (
olfactory receptor genes in elephants are the
largest at around 2,000).
At around 1,800 genes, it is the second -
largest gene family to be discovered in an animal, after the elephant's 2,000
olfactory -
receptor genes.