1. What gene determines size in big cats: tigers, jaguars, etc?
2. Does melanism affect any other characteristics or weaknesses within
the big cats?
3. Is it a gene that reinforces their predatory instinct and
aggression? If so, which gene?
2006-07-11 08:35:17 · 3 answers · asked by rashenbo 1 in Science & Mathematics ➔ Zoology
#1. The genomes for the big cats have not been sequenced, and even if they had, no one gene would be responsible for determining size differences between the species. However, it is likely that a homeobox (hox) gene may be involved - hox genes regulate other clusters of genes and their activity, particularly timing and development. A change in a hox gene can have multiple cascading effects through a genome.
#2. Melanism has arisen independently in cat species at least three times. Based on what research has been done, different genes are involved in jaguars than in house cats, for example. Given that melanism is found in so many feline species, and is generally common, it is believed that there may be some selective advantage to being melanistic.
Some researchers believe that melanism may provide improved camouflage in some species. Others are investigating the possibility that melanism may help some cat species resist certain diseases.
#3. Again, single genes are not responsible for single traits. The entire evolutionary history of the big cats has reinforced those genetic traits that make them such superb predators.
2006-07-11 15:12:02 · answer #1 · answered by jillmcm1970 5 · 2⤊ 1⤋
The only one of those that can be answered is #2 and no melanism has no other effect on the animal that I know of.
2006-07-11 08:41:34 · answer #2 · answered by joereese69 2 · 0⤊ 0⤋
1.Their last name separate them.
2.No,it's not affect their characteristics.
3,Maybe,but I don't know.
2006-07-11 14:05:19 · answer #3 · answered by Hafiz W 1 · 0⤊ 0⤋