Biology 206 Exam #1 | Actual study |
Questions and Answers
meiosis - ANSW-process in which half the number of diploid number is distributed into spores or
gametes to provide them with the number of haploid number of chromosomes
what are the two forms of DNA? - ANSW-chromatin & chromosomes
Where does meiosis occur? - ANSW-germ cells
where does mitosis occur - ANSW-somatic cells
what happens during mitosis - ANSW-original cell copies DNA one time and divides one time
what happens during meiosis - ANSW-original cell copies DNA one time and divides two times
What are the results of mitosis? - ANSW-two new somatic cells each w/ a full set of chromosomes
identical to the original cell
what are the results of meiosis - ANSW-4 new cells called gametes each with half the amount of
chromosomes present on the original germ cell
what are the 3 processes in meiosis that create genetic diversity - ANSW-crossing over, independent
assortment, & segregation
what is crossing over and what stage does it occur - ANSW-chromatids cross and exchange genetic
information in equal amounts
takes place during late prophase 1
what is independent assortment and what stage does it occur - ANSW-pairs of homologous
chromosomes line up and separate independently
occurs in metaphase 1
what is segregation ans what stage does it occur - ANSW-the separation of homologous pairs
takes place during anaphase 1
why cant crossing over, independent assortment, and segregation occur on meiosis 2 - ANSW-no
homologous pairs are present
what are the stages of meiosis in order - ANSW-1. Pre-S Interphase
2. Post- S interpase
3. prophase 1
4. metaphase 1
5. telophase 1
6. interkinesis
7. Prophase 2
8. Metaphase 2
9. Anaphase 2
10. Telophase 2
what is a centromere - ANSW-central location that holds the chromatin together so it can undergo
meiosis
what are homologous chromosomes - ANSW-they code for the same genes
Questions and Answers
meiosis - ANSW-process in which half the number of diploid number is distributed into spores or
gametes to provide them with the number of haploid number of chromosomes
what are the two forms of DNA? - ANSW-chromatin & chromosomes
Where does meiosis occur? - ANSW-germ cells
where does mitosis occur - ANSW-somatic cells
what happens during mitosis - ANSW-original cell copies DNA one time and divides one time
what happens during meiosis - ANSW-original cell copies DNA one time and divides two times
What are the results of mitosis? - ANSW-two new somatic cells each w/ a full set of chromosomes
identical to the original cell
what are the results of meiosis - ANSW-4 new cells called gametes each with half the amount of
chromosomes present on the original germ cell
what are the 3 processes in meiosis that create genetic diversity - ANSW-crossing over, independent
assortment, & segregation
what is crossing over and what stage does it occur - ANSW-chromatids cross and exchange genetic
information in equal amounts
takes place during late prophase 1
what is independent assortment and what stage does it occur - ANSW-pairs of homologous
chromosomes line up and separate independently
occurs in metaphase 1
what is segregation ans what stage does it occur - ANSW-the separation of homologous pairs
takes place during anaphase 1
why cant crossing over, independent assortment, and segregation occur on meiosis 2 - ANSW-no
homologous pairs are present
what are the stages of meiosis in order - ANSW-1. Pre-S Interphase
2. Post- S interpase
3. prophase 1
4. metaphase 1
5. telophase 1
6. interkinesis
7. Prophase 2
8. Metaphase 2
9. Anaphase 2
10. Telophase 2
what is a centromere - ANSW-central location that holds the chromatin together so it can undergo
meiosis
what are homologous chromosomes - ANSW-they code for the same genes
