After the third dose -- given at age 6 months -- your child will be 80% to 85% immune to whooping cough for 3 to 5 years. Everyone -- including adults -- from age 11 up should receive a booster vaccine, called Tdap. It's a combined tetanus, diphtheria, and pertussis booster vaccine.
How many chromosomes are in the nucleus of an onion root cell? There are 8 chromosomes in the nucleus of an onion root cell. The cells are undergoing mitosis, during which the amount of DNA is doubled even as the number of chromosomes â¦ remains constant. How many chromosomes do onions have?
Onions are very low in calories and fats. 100 grams carry just 40 calories. However, rich in soluble dietary fiber. The phytochemical compounds allium and Allyl disulfide in the onions convert into allicin by the enzymatic reaction when its bulb (modified leaves) are distorted (crushing, cutting, etc.).