Chromosome 1 is the largest human chromosome, made up of around 249 million nucleotide base pairs and representing approximately 8% of the entire DNA within a human cell. Research into chromosome 1 has shown that it contains around 4,220 genes and was the last gene to have its DNA sequencing completed by The Human Genome Project, nearly twenty years back.
Taco Casserole. 1  1 pound ground beef, lean, ground round. 2  1/2 cup chopped onion. 3  1 clove garlic, pressed or minced. 4  1 (8 ounces) can tomato sauce. 5  1/2 cup tomato juice, beef broth, or water. 6  1 tablespoon chili powder. 7  1/4 teaspoon oregano, crumbled. 8  1 (approximately 15 ounces) can kidney beans, undrained.
3. Ground beef must be at least 70% lean. No more than 30% fat. It is usually leaner than that, though. 4. Ground beef is not made from âleftoversâ or âscraps off the floorâ. The fact is, not every cut of beef is equal. Some make great steaks on the grill.