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11 Cards in this Set
- Front
- Back
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Multiple choice |
C D C |
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Polygenic inheritance |
Multiple genes will affect the expression of a characteristic |
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Eukaryotes vs prokaryotes |
E has nuclei, p has free dna in loops and plasmids. Both have cell membranes, cyto, ribosomes but longer in eukaryotes{80vs70},e has membrane bound organelles eg mito |
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What happens if no g1 or g2 |
no time to grow and make kore cyto or proteins, so cells produced will get smaller bcos same amount but shared between more cells |
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How cell becomes specialised |
some genes get inactivated and ithers stay active. Active genes read + transcribes into mrna strands. Translated to polypeptide chains which become proteins. can change shape of cell+other features |
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tissues vs organs |
tissue is cells working together and organ is tissues working together. Organs are more complex |
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Flagellum |
Rotates + moves to allow sperm to swim and move through uterus to reach ovum |
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Acrosome |
releases digestive enzymes that digest through follice cells and zona pelu to allow the sperm nucleus to reach the ovum one |
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Colour blindness |
Sex linked, men only have to inherit one affecteed chromosome whereas females have to inherit two |
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Independent assortment |
Either chromosome from each pair can end up in any gamete, so gametes=genetically variable |
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Crossing over |
Homologous chromosomes come together as pairs, chromatids come into contact at chaisma region, then break+rejoin. Exchange sections of dna. |
