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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. |
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Inherited characteristics |
Are decided by our genes e.g skin colour ,eye colour ,hair colour. |
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Non-inherited characteristics |
Are the traits learned during our life e.g accent ,musical instruments,singing ,writing ,driving |
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Diagram of a cell |
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A gene |
A gene is a small section of DNA found along a chromosome which controls our characteristics. |
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A chromosome |
A chromosome is a thread like structure found in the nucleus of a cell.It's made up of protein and DNA. |
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What is each characteristic controlled by ? |
It's controlled by 2 genes (one from your mother ,the other from your father ) |
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Normal body cells have how many chromosomes ? |
46 chromosomes or 23 pairs altogether(23 maternal chromosomes and 23 paternal chromosomes . |
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How many chromosomes does a sex cell have ? |
A sex cell (sperm and eggs) have only 23 chromosomes . |
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A dominant gene |
A dominant gene is one which always works and controls the characteristic.It's given a capital letter. |
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A recessive gene |
Is one which doesn't work in the presence of a dominant gene.It given a small letter. |