click below
click below
Normal Size Small Size show me how
11754-2017
KPHS-Chapter 11.4 = Meiosis
Question | Answer |
---|---|
What is Meiosis? | It is the process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. |
What is a Diploid Cell? Hint double. | (two sets) 2N. A cell where half of the chromosomes come from the male and half come from the female. |
What does homologous mean? | The chromosomes from the male parent has a corresponding chromosome form the female parent. A cell that contains both sets of chromosomes is said to be diploid. |
What is a diploid cell? | Most adult organisms contain two complete sets of inherited chromosomes and two complete sets of genes. |
What number represents diploid cells? | The diploid number of chromosomes is represented by 2N. A diploid number of 8 is represented as 2N=8. N is the single set of chromosomes found in a sperm or egg cell. |
What is a Haploid cell? Hint if diploid is 2N then Haploid is half of that. | (one set) N. A cell that only has one single set of chromosomes and therefore a single set of genes. A haploid number is 4 which can be written as N=4. |
What is Meiosis? | It is the process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. |
Meiosis has two phases Meiosis I and Meiosis II | See PAge 324 and 325 |
What is a Zygote? 325 | A Zygote is a fertilized egg. The zygote undergoes cell division by mitosis and eventually forms a new organism. |
Compare Mitosis and Meiosis? | See Page 326. Mitosis can be a form of asexual(one parent) reproduction. Meiosis is an early step in sexual(two parents) reproduction. |
Compare Mitosis and Meiosis? | In mitosis when 2 sets of genetic material separate, each daughter cell receives one complete set of chromosomes. In meiosis, homologous chromosomes line up and then move to separate daughter cells. |
Compare Mitosis and Meiosis? | Mitosis does not normally change the chromosome number of the original cell. This is not the case for meiosis which reduces the chromosome number by half. |
Compare Mitosis and Meiosis? | A diploid cell that enters mitosis with 8 chromosomes will divide to produce 2 daughter cells with 8. A diploid cell that enters meiosis with 8 chromosome cells will divide into two cells that have 4 chromosomes each. |