Our Journey To Now: Outcome 6

DNA stands for…

Deoxyribonucleic acid

DNA holds…

the instructions for developing organs the order of assembly, and their cooperation

Nucleotides are

repeating structural units of DNA. They are composed of phosphate groups, pentose sugars and a nitrogenous base

The structure of DNA is

a double helix structure composed of nucleotides

• Phosphate groups and pentose sugars forming the sides of the double helix

• And the nitrogenous bases forming the rungs

The nitrogenous bases are…

• Adenine (A)

• Thymine (T)

• Cytosine (C)

• Guanine (G)

What are the base pairs?

• Adenine (A) + Thymine (T)

• Cytosine (C) + Guanine (G)

Rosalind Franklin used what to show the structure of DNA?

Rosalind Franklin used X-ray crystallography to discover that DNA is in the shape of a twisted ladder called a double helix

What did Watson and Crick use to backup their evidence on DNA structure

They used Franklin’s data to prove that DNA was a double helix structure. However they did not give her any credit.

What is a gene?

A gene is a unit of inheritance and are segments of DNA

How many copies of each gene does one person have?

Every person has 2 copies of the same gene, inherited from each parent. These are called alleles.

What are chromosomes?

They are condensed DNA when a cell is about to divide (mitosis or meiosis).

What are chromosomes made of?

Chromosomes are made up of genes.