Genetic Processes. Origins Of Diversity Genetic material is what determines the difference between you, your siblings, friends, pets, plants, and everything.
Post on 29-Dec-2015
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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
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