Variation And Inheritance Flashcards
What is each of our characteristics controlled by?
A pair of genes
Where do our genes come from?
One gene comes from your mother and one gene comes from your father
What term describes characteristics that are more common?
Dominant
What term describes characteristic that are less common?
Recessive
What is variation?
The differences that exists between the members of a species
What are the 2 types of variation?
Discrete and continuous
What is discrete variation?
Characteristics that can be separated into distinct groups
What is discrete variation controlled by?
A single gene
Give 3 examples of discrete variation
- Earlobes
- Writing hand
- Tongue rolling
What type of graph is used to display information about discrete variation?
Bar graph
What is continuous variation?
Characteristics which show a continuous range of possibilities between a minimum and miscommunication value
Why does continuous variation occur?
When a characteristic is influenced by several genes
Give 3 examples of continuous variation
- Hand span
- Foot length
- Height
What type of graph is used to display information about continuous variation?
Line graph
What is a phenotype?
The outward appearance of a gene
