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Chp2 Lessone3
HI Science 6
| Question | Answer |
|---|---|
| How many pairs of chromosomes do most human cells contain? | 23 |
| How many chromosomes are in the human sex cells? | 23 |
| The process by which body cells develop is called what? | mitosis |
| The process by which sex cells develop is called what? | meiosis |
| There are 5 steps of Mitosis: Name the first 4 | 1.Chromosomes make exact copies of themselves. 2.Nuclear membrane disappear. 3.Doubled chromosomes line up across the middle of the cell. 4.Chromosomes split apart and go to the opposite sides of the cell. |
| What is the 5th step of Mitosis: | 5. New nuclear membranes form around the chromosomes and the the cell splits into two new identical cells. |
| How many chromosomes do most human cells contain? | 46 |
| In plants and animals, mitosis results in how many cells and what do they look like? | two cells that are identical to the original parent cell |
| What do we call the process when plants and animals combine chromosomes from two parents? | sexual reproduction |
| What is the male sex cell called? | sperm |
| What is the female sex cell called? | egg |
| When the male sex cell (sperm) and and the female sex cell (egg) join, the new cell is called what? | zygote |
| What does the zygote develop into? | a new organism |
| What develops into a new organism? | zygote |
| In meiosis, the cell divides how many times? | twice |
| Why does the cell divide twice in meiosis? | So that the cell produced will have half the number of chromosomes as the parent cell. |
| Fill in the blank: In meiosis, the cell produced will have _____the number of ________ as the parent cell. | half......chromosomes |
| Human sex cells have _____chromosomes. | 23 |
| As a result of sexual reproduction, the sex cells combine to form a ___________with ________ chromosomes just like the regular cells of the parent. | zygote.......46 |
| The offspring that results from sexual reproduction, receives ____________from both parents. | chromosomes |
| _________produces cells with the same number of chromosomes as the original cell. | Mitosis |
| _______produces cell with half as many chromosomes as the original cell. | Meiosis |
| How many cell divisions are there in mitosis? | one |
| How many cell divisions are there in meiosis? | two |
| The final result of mitosis is how many cells? | two |
| The final result of meiosis is how many cells? | four |
| What do we call the simplest means of reproduction in which a new organism comes from one parent? | asexual reproduction |
| In asexual reproduction what does the offspring look like? | it is identical to the parent |
| What is the advantage of asexual reproduction? | a species can increase their number rapidly |
| What do we call it in asexual reproduction when a species can increase their number rapidly? | rapid reproduction |
| When the sperm and egg cell joins this is called? | fertilization |
| A zygote begins to divide by what process? | mitosis |
| Eventually, from ____cell a new organism develops. | one |
| The stages of an organism's growth and development make up its ___________________. | life cycle |
| The stages of an organism _________ and __________ make up its lifecycle. | growth and development |
Created by:
douglastmo
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