The whooping cough vaccine for children is very safe for your baby. The whooping cough vaccine for children (2 months through 6 years) is called DTaP vaccine. The DTaP vaccine combines protection against diphtheria, tetanus and whooping cough. Currently, there are 3 licensed formulations of the DTaP vaccine.
Human egg cells contain one set of 23 chromosomes. Because they contain half of the 46 chromosomes contained in body cells (2 sets of 23), the egg cells are said to be haploid. Human egg cells contain one set of 23 chromosomes. Because they contain half of the 46 chromosomes contained in body cells (2 sets of 23), the egg cells are said to be haploid.
Chromosomes are arrangements of genes made from DNA. Most of the chromosomes of plants and animals are arranged in pairs. The number of chromosomes varies among organisms. Humans typically have 46, a rice plant has 12, a fruit fly, 4. During human reproduction, both the egg and sperm donate 23 chromosomes to the fertilized egg, the zygote, for a total of 23 pairs. Each pair of chromosomes has one allele from each parent for every gene.