Genetic Processes

Origins Of Diversity Genetic material is what determines the difference between you, your siblings, friends, pets, plants, and everything living. Traits are characteristics of an organism. These are transferred from generation to generation. Sexually reproducing species get traits from both parents or a combination.

Genetic Material Unknown until the mid 1900s. Theorized to have connection to proteins. Through experiments with bacteria and viruses they determined Genetic Material was made of Deoxyribonucleic Acid (DNA) DNA is organized into Genes that code for specific traits and functions.

Packing of DNA DNA is a double helix (2 strands). Clumps of DNA fibres are called Chromatin In preparation to divide, chromatin condense to form Chromosomes Every animal as a different # of Chromosomes. Humans have 46, dogs have 78

Packing of DNA DNA is coiled around proteins called Histones. A group of these Histones is called a Nucleosome. This prevents the DNA from getting tangled.

DNA Structure DNA spiral (helix) discovered using X-ray crystallography research of Dr. Rosalind Franklin

DNA Structure The work of Dr. Franklin was used by James Watson and Francis Crick. These 2 men were “credited” with discovering the structure until recently. Go girl.

The Components of DNA DNA is a repeating structure with the same basic make up.

The Components of DNA

Cell Cycle

Read pg #1-3, 5-10, 11,13,15