Review Questions
- What is parthogenesis?
- How can organisms reproduce asexually?
- How would sexual reproduction in a lizard be different than a fish?
- Are the viable eggs that birds lay need to be fertilized externally?
- How do most plants reproduce sexually?
- What is the purpose of meiosis?
- What is the advantage of sexual reproduction over asexual reproduction?
- If an organism has 12 chromosomes in its cells, how many chromosomes will be in its
gametes? - During what phase of meiosis do homologous chromosomes separate?
- In what phase of meiosis do homologous chromosomes pair up?
Further Reading / Supplemental Links
- http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookmeiosis.html
- http://www.biology.arizona.edu/Cell_BIO/tutorials/meiosis/page3.html
- http://www.cellsalive.com/meiosis.htm
- http://www.youtube.com/watch?v=MqaJqLL49a0&NR=1
- http://en.wikipedia.org/
Vocabulary
allele An alternative form of a gene.
asexual reproduction A form of reproduction in which a new individual is created by
only one parent.
binary fission An asexual form of reproduction where a cell splits into two daughter cells.
crossing-over Exchange of DNA segments between homologous chromosomes; occurs dur-
ing prophase I of meiosis.
cross-pollination Sexual reproduction in plants where sperm from the pollen of one flower
is received by the ovary of another flower.
diploid When a cell has two sets of chromosomes.
gametes Cells involved in sexual reproduction; typically egg and sperm cells.