Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
Genetics |
Genetics is the study of heredity.(ie the way in which characteristics are passed on from parents to offspring. |
|
|
Inherited characteristics |
Are decided by our genes e.g skin colour ,eye colour ,hair colour. |
|
|
Non-inherited characteristics |
Are the traits learned during our life e.g accent ,musical instruments,singing ,writing ,driving |
|
Diagram of a cell |
. |
|
|
A gene |
A gene is a small section of DNA found along a chromosome which controls our characteristics. |
|
|
A chromosome |
A chromosome is a thread like structure found in the nucleus of a cell.It's made up of protein and DNA. |
|
|
What is each characteristic controlled by ? |
It's controlled by 2 genes (one from your mother ,the other from your father ) |
|
|
Normal body cells have how many chromosomes ? |
46 chromosomes or 23 pairs altogether(23 maternal chromosomes and 23 paternal chromosomes . |
|
|
How many chromosomes does a sex cell have ? |
A sex cell (sperm and eggs) have only 23 chromosomes . |
|
|
A dominant gene |
A dominant gene is one which always works and controls the characteristic.It's given a capital letter. |
|
|
A recessive gene |
Is one which doesn't work in the presence of a dominant gene.It given a small letter. |
