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bio grade 10
Genes
| Question | Answer |
|---|---|
| What are chromosomes? | A threadlike structure made up of DNA which controls the function & characteristics of a cell (chromatin) |
| How many pairs chromosomes are in a human? | 23 pairs |
| What is a chromatin? | Uncoiled DNA |
| What are the 3 parts of DNA | phosphate, sugar (deoxyribose) and 4 nitrogeneous bases |
| Name the nitrogeneous bases | Adenine (A), Thymine (T), Guanine (G), Cytosine (C) |
| A _____ is 3 nucleotide sequence in which the order of the nitrogenous bases make up a certain amino acid. | Codon |
| What is a nucleotide? | A rung made up of 2 nitrogeneous bases. |
| What are amino acids. | Amino acids join together to form proteins which carry out a specific task from the DNA |
| _______ carries out specific tasks from the DNA | Proteins |
| _______ are a segment of a DNA strand which controls a certain trait of an individual. | Genes |
| What is PKU? | Phenylketonuria is when the body does not have the enzyme to digest phenylamine found in certain proteins. It can cause brain damage. |
| What do they test baby's blood for? | For PKU, to see if the baby has the protein enzyme. |
| What is down syndrome? | A genetic disease caused when the embryo has extra chromosomes. |
| Describe the process for testing Down syndrome. | Amniotic fluid from the sac is taken and a micrograph of each of the pairs of chromosomes is taken. (called a karyotype) |
| What disease affects nerve cells and makes a person lose muscle control? | Huntington's Disease |
| How do you test for Huntington's disease? | A DNA screening of the individual for the gene. If 1 parent has the gene, you have 50% chance of getting the disease. |
| What is a Transgenic Organism? | A genetically modified organism (GMO) whose genes are altered or genes from another species is inserted. |
| ________ ________ is the process of combing genes (DNA) from one organism to another. | Genetic Engineering |
| what is a mutation? | This happens when the codon sequence in the gene segment of the DNA strand is changed in order it was in, an abnormality is formed and the protein cant function properly. |
| What is a mutagen? | radiation or substances that cause the genes to mutate |
| what is the process of creating identical genetic copies of an organism? | cloning |
| when was Dolly created? | 1996, and the first mammal to be cloned. |