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Terms
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- Prophase 2
- No more crossing over, much shorter phase
- Ova
- female large gamete cells, 1 produced in each meiotic division
- Metaphase 2
- Chromosomes move to the equator in each of the two cells. There are no matching chromosome pairs. Chromosomes line up in single file down the center of each cell, as in mitosis
- Chromatid
- one of two strands of a replicated chromosome before their separation during mitosis or meiosis
- Anaphase 1
- Matching chromosomes of each pair separate and begin to move toward opposite poles of the spindle, each chromosome still consists of two chromatids attached at the centromere
- Gamete
- sex cells
- Prophase 1
- Crossing over occurs, chromosome pairs move to the equator
- Fertilization
- the nuclei of two gametes unite to produce a zygote, creates diploid no. in zygote
- Asexual reproduction
- new individuals are produced from a single parent
- Centromere
- Specialized region of a chromosome that holds two replicated chromosomal strands together and that attaches to the spindle in mitosis
- Telophase 1
- As the approach the the poles, cytokinesis occurs, making two cells. matching chromosomes are in different cells for 1st time. contains parent cells total information
- Anaphase 2
- Centromeres divide, two chromatids of each chromosome separate and move toward opposite poles
- Telophase 2
- Chromosomes gather at the poles and are enclosed by new nuclear membranes. Cytokinesis now occurs resulting in 4 haploid cells
- Sexual reproduction
- reproduction requiring two parents and two very different types of cells
- Metaphase 1
- chromosomes move to center of cell where they line up
- Sperm cells
- small male gamete cells, DNA in small head, 4 produced in each meiotic division