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Mitosis & Meisis
| Question | Answer |
|---|---|
| What is selective breeding? | The breeding of animals with specific characteristics. |
| What is inheritance? | The passing of characteristics form one generation to the next. |
| What is genetics? | A branch of science that studies genes and inheritance. |
| What is a chromosome? | A stucture inside a cell. |
| What are genes? | A part of a chromosome that determines a wide range of physical characteristics. |
| What is DNA? | A structure inside a cell that contains all the information the cells need to produce new cells. DeoxyriboNucleic Acid. |
| What are chromotids? | The strands that make up DNA. |
| What does a centromere do? | It holds the DNA strands together. |
| What is Mitosis? | A process in asexual reproduction when and organism grows a new living thing identicle to itself. The DNA in a cell replicates then the cell splits to make two identicle cells. |
| What are daughter cells and mother cells? | Daughter cells: The two new genetically identicle cells made from mitosis. Mother cell: The cell that splits into two cells to make the daughter cells. |
| What is a gamete? | A gamete is a sex cell used to reproduce in plants and animals. Produced in meiosis. |
| What is a zygote? | An individual cell formed when the male sperm furtilises the female ovum. |
| Which parent is the zygote identicle to? | Neither because the genes have come from both parents. |
| How does the zygote grow? | The zygote grows through the repetition of mitosis. The embrio grows and developes to become a neww indivdual. |
| What is a diploid nimber? | The number of chromosomes in each body cell. |
| How many pares of chromosomes does a human cell have? | 23 |
| What is the first step of mitosis? | Interphase. |
| What happens in interphase (step 1)? | The cells DNA either replicates or the cell stays the same. The cell is preparing for mitosis. |
| What happens in parophase (step 2)? | The DNA thickens and the centrioles (poles) and spindles form. The nucleous shrinks and the chromotids thicken |
| What happens in metephase (step 3)? | The chromotids align at the equator of the cell and attatch to the spindles. |
| What happens in anaphase (step 4)? | The chromotids seperate and more to the centioles. (Opposite sides of the cell.) |
| What happens in telophase (step 5)? | The chromosomes have reached the centrioles and the cell starts to split. The spindles disintergrate. |
| What happens in cytokinesis (step 6)? | Two new genetically identicle cells (daughter cells) are formed. |
| What else can you call Meiosis? | Sexual reproduction. |
| What are some examples of sex cells? | Sperm, eggs, spores, pollen and anthens. |
Created by:
brose9
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