Each excavation job as in any other case, must be evaluated as to the facts relating to the needs of a competent person, and qualified person. The professional judgement of OSHA must come into play by using our construction regulations where they apply.
Definition: A diploid cell is a cell that contains two sets of chromosomes. One set of chromosomes is donated from each parent. Examples: The diploid number of a cell is the number of chromosomes in the cell. This number is commonly abbreviated as 2n, where n stands for the number of chromosomes. For humans this equation would be 2n=46. Humans have 2 sets of 23 chromosomes for a total of 46 chromosomes:
These cells contain half the number of chromosomes as body cells and are called HAPLOID Chromosomes come in pairs, called Homologous Pairs (or homologs). Imagine homologs as a matching set, but they are not exacly alike, like a pair of shoes. Diploid cells have 23 homologous pairs = total of 46. Haploid cells have 23 chromosomes (that are not paired) = total of 23. Homologous Chromosomes . Sex Determination. Chromosomes determine the sex of an offspring. In humans, a pair of chromosomes called SEX CHROMOSOMES determine the sex. If you have XX sex chromosomes - you are female. If you have XY sex chromosomes - you are male. During fertilization, sperm cells will either contain an X or a Y chromosome (in addition to 22 other ...