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UNIT 3, CHPT 10
CHAPTER 10.2
| Question | Answer |
|---|---|
| what is a life cycle? | the generation to generation sequence of stages in the reproductive history of an organism |
| what is a karyotype? | a display of the chromosome pairs of a cell, arranged by size and shape |
| what are homologous chromosomes? | a pair of chromosomes of the same length, centromere position, and staining pattern. possess genes for the same characters at corresponding loci |
| what are sex chromosomes? | the chromosomes responsible for determining an individuals sex |
| what are autosomes? | chromosomes that aren't directly involved in determining sex; chromosomes that aren't sex chromosomes |
| what does (n) represent? | a single set of chromosomes |
| what does (2n) represent? | two sets of chromosomes |
| what is the human diploid number? | (2n=46) |
| what is the human haploid number? | (n=23) |
| what is fertilization? | the union of haploid gametes to produce a diploid egg |
| what is a zygote? | the diploid cell produced by fertilization |
| why does it make sense for gametes to be haploids? | if they were diploids, they would make 92 chromosomes after meiosis instead of 46 |
| what is meiosis? | a type of cell division where sexually reproducing organisms consist of two rounds of cell division, but only one round of DNA replication |
| what is alternation of generations? | a life cycle where there is both a multicellular diploid form and a multicellular haploid form |
| what types of cells can go through meiosis? | only diploid cells |
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SuperBugLover