Biology

Biology, 29.08.2019 20:50, amariyanumber1923

All are effects of crossing over of homologous chromosomes during prophase i of meiosis
- increased genetic variety
- increased number of chromosomes in the offspring
- the appearance of new phenotypes in the offspring
- possible harmful mutations from cross-over errors

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Biology, 30.06.2019 22:30, kayleebueno

Answers amoeba sisters: video recap meiosis1. interphase must occur before meiosis can happen. what would happen is interphase didn't occur first? 2. a cell that begins meiosis has 23 chromosomes inherited from the mother and 23 chromosomes inherited from the father. in the process of meiosis, chromosomes begin to match up in homologous pairs. how would you know if two chromosomes were homologous? 3. crossing-over is a very important event in prophase i of meiosis! what happens during crossing over and what is the significance? 4. meiosis does pmat twice! that means there is a prophase i and ii. there is a metaphase i and ii, etc. if the cartoon below has chromosomes in the middle of the cell, how should you know whether it was in metaphase i or ii? 5. meiosis does not always occur without any difficulties. describe what occurs during nondisjunction and the effect on the resulting cells.

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Biology, 07.07.2019 12:30, shakaylaousley1997

Which of the following statements best describes the major difference between prophase i of meiosis and prophase of mitosis? in prophase i, tetrads of homologous chromosomes form and crossing over occurs. in prophase, the nuclear membrane dissolves and spindle fibers attach to the chromosomes. in prophase i, the chromatin condenses to form visible chromosomes. in prophase, the replicated chromosomes are linked together as sister chromatids.

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Biology, 04.08.2019 14:40, cylertroutner

1) which of the statements below is not true about meiosis and/or mitosis. a) one reason meiosis i is different from mitosis because homologous pairs of chromosomes line up next to each other and then separate. b) daughter cells are produced in meiosis with half the number of chromosomes as the parent cell. c) no exchange of genetic material is exchanged during meiosis, so there is no genetic diversity as a result of this process. 6) which of the following is a true statement about crossing over? a) crossing over occurs in both mitosis and meiosis i b) crossing over occurs during prophase i of meiosis; because of crossing over, genetic variation in the resulting gametes is increased. c) crossing over occurs in telophase ii of meiosis; it decreases the genetic variability in the gametes produced.

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Biology, 21.10.2019 18:50, insulation62

All of the following are effects of crossing over of homologous chromosomes during prophase i of meiosis with the exception of a) increased genetic variety. b) increased number of chromosomes in the offspring. c) the appearance of new phenotypes in the offspring. d) possible harmful mutations from cross-over errors.

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