113937
Descripción
Fichas por sammi_taylor01, actualizado hace más de 1 año
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Creado por sammi_taylor01
hace casi 11 años
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| Pregunta | Respuesta |
| What is the DNA like in prokaryotic cells, such as bacteria? | -much smaller -forms circles -do not associate with protein molecules -do not have chromosomes |
| What is the DNA like in eukaryotic cells? | -associates with proteins -has chromosomes -molecules are larger and linear |
| What are the two assets of a chromosome? | -two chromatids -one centromere in the centre holding the chromosome together |
| When are chromosomes visible? | When cells are dividing (prophase) |
| How is the DNA in the chromosomes held in position? | proteins |
| How is the length of the DNA found? | Highly coiled and folded. |
| How many chromosomes do humans have? | 46 |
| Chromosomes occur in pairs called.. | homologous pairs. |
| Homologous chromosomes are made up of.. | one chromatid from the mother and one from the father, it is diploid. |
| A homologous pair is always.. | two chromosomes that determine the same genetic characteristics, however determining the same characteristics is not the same as being identical. |
| What is an allele? | variation of a gene |
| What does each allele code for? | It's own polypeptide |
| What happens as a consequent of a difference in the base sequence of an allele of a single gene occurs? | May result in a different sequence of amino acids being coded for, therefore different polypeptides- different primary therefore tertiary structure, substrate may not fit enzyme's active site etc. |
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