Essential Idea: Every living organism inherits a blueprint for life from its parents |
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1. A heritable factor that consists of DNA and influences a specific characteristic is ...
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2. Where could genes be located in a bacterium?
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Q3+4: In pea plants there is a gene controlling the height of the plant. |
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3. The specific position of this gene on a chromosome is called a ...
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4. Pea plants may be tall or short. This is controlled by alternative forms of the gene called ...
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Q5-7: In normal haemoglobin the sixth codon of the gene, HbA, for haemoglobin is GAG. This codes for the amino acid glutamic acid. |
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5. When the protein of haemoglobin is made in the cell, what would be the bases in the anticodon for glutamic acid?
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6. Sickle cell anaemia is the commonest genetic disease in the world. It is caused by a change in the allele for normal haemoglobin HbA to HbS. This causes the red blood cells to become sickle shaped.
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6. What is thought to be the origin of the HbS allele?
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7. The diagram shows part of the wheel of RNA codons coding for each amino acid.
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When the HbS allele is formed the second base of the codon is changed from A to U. Which amino acid is made as a result of this change?
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8. Which of the following is correct?
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9. The Human genome project was begun in 1990. When was the entire base sequence of human genes completed?
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10. How many protein-encoding genes do scientists think are present in the human genome?
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