DNA Flashcards
Who discovered D.N.A
Francis Crick and James Watson
What is the structure of D.N.A
Two sugar phosphate chains and four different nucleotide sub units
Names of the four types of nucleotide sub units
Guanine, Cytosine, Adenine, Thymine
What is a chromosome
A structure found in a nucleus
How many chromosomes do we have
46
What is a gene
The functional and physical unit passed down from parents to offspring
inherited genes
Height, eye colour, shoe size
environmental units
Weight, Smell, long hair
The different blood groups
O neg
O pos
A neg
A pos
B neg
B pos
AB neg
AB pos
Are blood groups environmental or inherited
Inherited
how are Identical twins made
When a fertilised egg is divided into 2
How much of their genes do non-identical twins share
50%
How much of their genes do identical twins share
100%
What is an I.V.F baby
A baby made in the lab
How do you make an I.V.F baby
by removing the egg from the women’s ovaries and fertilising it with sperm made in the lab
Inherited diseases
Cancer
Blindness
Downs
What is a double helix
A term to describe the physical structure of D.N.A
What is the Placenta
An organ that forms the womb. also called the uterus
What is Progeria
It is a genetic disorder that causes children to age rapidly
What is karyotype
It is a persons full set of chromosomes
