The following people are at increased risk of urinary tract infection: 1  People with conditions that block (obstruct) the urinary tract, such as kidney stones. 2  People with medical conditions that cause incomplete bladder emptying (for example, spinal cord injury)
From his data, he formulated the Principle of Independent Assortment. We now know that this independent assortment of genes occurs during meiosis in eukaryotes. Meiosis is a type of cell division that reduces the number of chromosomes in a parent cell by half to produce four reproductive cells called gametes. In humans, diploid cells contain 46 chromosomes, with 23 chromosomes inherited from the mother and a second similar set of 23 chromosomes inherited from the father.
The usual method of prokaryote cell division is termed binary fission. The prokaryotic chromosome is a single DNA molecule that first replicates, then attaches each copy to a different part of the cell membrane. When the cell begins to pull apart, the replicate and original chromosomes are separated.