A clear case of dubious thinking. Of course, some tomato-hating folks tend to lump the fruit, figuratively at least, with things like arsenic and cyanide. In fact, as late as the early 20th century, many people wouldn't eat tomatoes because they believed them to be poisonous. Genes are tiny carriers of hereditary traits that, in interaction with other genes, produce the various characteristics that determine the nature of an organism's offspring. Estimates of the number of genes in a human have ranged as high as 100,000, though some new research suggests the human genome might be as small as 30,000 or so genes.
Chromosomes are threadlike collections of genes.
You can think of them as suitcases, with genes as the contents. Every human possesses 23 pairs of chromosomes, half taken from each parent. Well, it's debatable that anyone has really domesticated the cat, but the simple answer, in any event, appears to be the dog. Skeletons of dogs have been found in the remains of human habitations dating back at least 10,000 years. Indeed, dogs may have been the first animals to be selectively bred for more desirable traits, with the original working stock being the wolf.