![]() It’s possible that dogs have S and D genes, (S for Sinistral meaning left). Although, since dogs are split half and half for paw preference it wouldn’t make sense that a dog’s preference is decided the same way because humans show 90% right hand tendencies. This type of research has not been as widely studied in other animals but may be the same in other animals. People with C become amenablte to influences as stated earlier such as society and culture forcing kids to be right handed. People with the C gene have a 50% chance of a left hand preference and a 50% chance of a right hand preference. D is more frequent in the population and is more likely to occur. There are 2 alleles of a gene, C and D, at the same genetic location. (Corballis, 1997) The genetic proposal to explain hand preference states the following. The way that handedness is decided is through genes. For most, the parts of the brain that govern language are present in the left side of the brain these people tend to be right-handed. Language ability is split between the different hemispheres of the brain, much like handedness, which suggests that handedness became connected to language ability. Also, some more restrictive societies show less left-handedness in their populations than other more permissive societies. For instance, teachers have been known to force children to switch from using their left hand to using their right hand for writing. There is evidence that handedness can be influenced by society and culture. There are many different theories about how humans’ handedness is decided. How Dogs’ and People’s Handedness/ Pawedness is Decided This is body mechanics and is used to balance out their bodies while running. If the dog’s head is tilted to the right, they will lead with their left paw and vice versa. This could be due to the dog’s head position at the time. In Test 4, three of the dogs’ preferences switched between trials, and 3 of the trials had 50% results. In test 1, two of the dogs’ preferences switched between trials, and 4 of the trials had 50% results. It is possible that the dogs who didn’t appear to have a preference actually do have a preference based on the results of Test 2. Also, for all dogs except for Scout, the result of Test 2 was their overall preferred paw. Test 2 was also very reliable because no dog switched sides between trials and no dog ever got 50% either. Test 3, which was not involving paws, was a very reliable test for lateralization since no dog switched sides between trials and no dog ever had 50%. When comparing the results from each dog (Table 1), it was discovered that seven of the ten dogs had a paw preference, but the dogs without a paw preference all still had lateralization preferences. This whole procedure was repeated approximately one week later to gather more data, in order to show me how much of a preference these dogs really have for their right or left paws. The dogs were asked to put their front paws on a ledge (a window sill, a couch, or a stool). The dogs were asked to lay down then a treat was placed on each side of it to see which side they took it from. The dogs were asked to sit then lay down to determine which foot they initially extended to lay down. This test was repeated 10 times and recorded each time to determine whether or not there was a trend in which paw went first. The foot they started moving with was recorded. The dogs were asked to sit and then to come. Materialsįor each dog, the following were recorded: its age, gender, training level (high or low), whether or not it was spayed/neutered, reactivity to noises such as thunderstorms and fireworks,and its aggressiveness towards strangers.Four tests were then performed on each dog. Just like no matter what day, humans will always write with their preferred hand. whether or not the dog handler is on a different side), the paw preference of the dog will not be affected. It is believed that regardless of the conditions of the test (i.e. Test 3 (which is where the dog picks a treat from their preferred side) might show different results since it didn’t involve the use of paws. It is expected that the dogs will show a strong preference of paws throughout the trials. It is believed that the dominant hand was determined by one’s genes, because most people have the same preferred hand as their parents. It was hypothesized that most dogs would be right pawed because most humans are right handed and it was expected that this trend would also be found in dogs.
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