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?
How many chromosomes do you have in your gametes? 23 Gametes (eggs and sperm) need to have half the normal chromosome number OS that when they combine the create a normal (or diploid) cell with 46 chromosomes. How many chromosomes are in a female human gamete? There are 23 chromosomes in a female human gamete.