B9 Inheritance Flashcards
(23 cards)
What is heredity
The process by which genetic information is transmitted from one generation to another
What is DNA
A genetic code
Where is DNA found in the cell
In the nucleus
What is a chromosome
A long chain of coiled DNA
What is a gene
A section of DNA coding for a protein
Name the scientists who collectively discovered the structure of DNA
Francis Crick
James Watson
Maurice Wilkins
Rosalind Franklin
In biology, what is variation
Differences between organisms
What is genetic variation
Differences caused by DNA
What is environmental variation
Differences caused by the environment
State two examples of genetic information in humans
Eye colour
Ear lobe shape
State two examples of environmental variation in humans
Scars and tattoos
State two examples of variation caused by environmental and genetic variation
Height, the foods a person likes to eat
Some variation can show a range of differences like height. What name is given to this type of variation
Continuous variation
Give two other examples of continuous variation
Skin colour, weight
Some variation is limited to a number of categories, like shoe sizes or eye colour. What name is given to this type of variation
Discontinuous variation
Give two other examples of discontinuous variation
Blood group, tongue rolling
Why are we not genetically identical to our parents
We inherit half of our DNA from each parent
What do animals compete with each other for
Food
Mates
Territory
What do animals compete with each other for
Light
Minerals
Water
Space
What is an adaptation
A feature that enables an organism to survive
Darwin’s theory of evolution occurs through which process
Natural selection
What is evolution
A change in inherited characteristics of a population over time
What are offspring
The organisms produced in reproduction
