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.
Independent assortment is one kind of genetic recombination, one where the chromosomes supplied by one's parents are literally independently assorted into resulting gametes. Note that reassortment is a similar process that occurs within the genomes of certain viruses. One way to view the process of independent assortment, and its impact on the genetic variation of offspring, is that, for the haploid human gametes, there (metaphorically) are 23 buckets and each bucket is to hold one homologue (actually 22 buckets of autosomes and one bucket containing a lone sex chromosome).