Genes, Heredity

• Chromosomes are threadlike structures made up of DNA that carry genetic information.
• Meiosis and mitosis, heredity and genetics
• Genetic variation is the differences between individuals within a species due to variations in their genes.
• The first 22 pairs of chromosomes are called autosomes, while the last pair determines sex.
• Males have an XY chromosome combination, while females have XX.
• Each gene has two alleles, one inherited from each parent.
• Alleles can be dominant or recessive.
• Somatic cell production