From there the Missouri flows east and southeast, ultimately joining the Mississippi River about 10 miles (16 kilometers) north of St. Louis, Missouri. The Missouri River flows through Montana, North Dakota, South Dakota, Nebraska, Iowa, Kansas, and Missouri.
Chromosome theory of inheritance. generalization that genes are located on chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance patterns, also states that mendelian genes have specific loci, chromosomes undergo segregation and independent assortment.
Humans have 23 pairs of chromosomes: one set from mom and the other from dad. Spread among these chromosomes are around 20,000 genes (think 23 lists of millions of letters, with about 20,000 words in amongst the random letters). The entire set of ~20,000 genes is called the genome. So, chromosomes are made of DNA and proteins. Genes are stretches of DNA that contain code to make proteins. DNA is a molecule made up of a sequence of nucleotides.