Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Meiosis
| Term | Definition |
|---|---|
| meiosis I | split homologous pairs |
| prophase I | homologous pairs hook up to form a tetrad, crossing over occurs |
| synapsis | pairing of homologs to form a tetrad |
| metaphase I | homologous pairs line up in the middle of the cell, still connected to each other |
| anaphase I | homologous pairs are pulled apart, crossing over is complete |
| telophase I | the cells divide and are now haploid, but still replicated, needs one more division, create two new cells each |
| meiosis II | split sister chromatids |
| end of meiosis II | 4 new daughter cells that are haploid and genetically different |
| genome | complete complement of an organism's DNA, includes genes, and chromosomes |
| DNA in eukaryotes | organized in chromosomes, in nucleus |
| genes | have specific places on chromosomes, section of DNA that is a recipe for a protein, protein becomes a trait, unit of heredity |
| gene mapping | finding the specific place where a gene is located on a chromosome |
| sperm+egg= | zygote, diploid cell |
| chromosomes | carry genes |
| sexual reproduction | creates genetic variation, fusion of sperm and egg |
| karyotype | ordered display of an organism's chromosomes, staining can reveal visible band patterns (genes) |
| nondisjunction | occurs when chromosomes aren't evenly split during meiosis |
| trisomy | 3 homologous chromosomes |
| monosomy | missing the other chromosome, one chromosome is missing from the pair |
| trisomy 21 | downs-syndrome |
| haploid | half the number of chromosomes, egg, sperm, n |
| diploid | double the number of chromosomes, one set from mom, the other from dad, 2n |
| sperm/egg | gametes, donate 23 chromosomes each, contain 22 autosomes and 1 sex chromosome, haploid |
| gametes | produced by meiosis, sperm/egg |
| meiosis vs. mitosis | meiosis has 2 divisions, mitosis only has 1, mitosis is used for growth and repair, meiosis is used for reproduction in animals, meiosis is haploid, mitosis is diploid, meiosis creates 4 genetically different cells, mitosis created 2 identical cells |
| meiosis | creates genetic diversity, no 2 daughter cells are genetically the same because of crossing over |
| spermatogenesis | creation of sperm |
| oogenesis | creation of eggs |
| allele | different versions of a gene |
| chromatid | replicated copy in a chromosome |
| crossing over | exchange of genetic information between a homologous pair |
| gene shuffling | introduces greater genetic variation |
| homologous pair | pair of the same chromosome from different parents |
| somatic cells | body cells, diploid, NOT sperm or egg |
| zygote | single cell, fertilized egg |
| gene linkage | genes that are almost always found together |
Created by:
ts2819
Popular Biology sets