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Bio Study Sets 12-16
sapling learning assignments: meiosis & genetics
| Question/Term | Answer/Definition |
|---|---|
| Are eukaryotes, bacteria, microscopic organisms, egg & sperm cell cell considered haploid or diploid? | Haploid |
| How does meiosis generate genetic variability? | When homologous pairs line up at the center during metaphase Chromatids cross over in prophase I |
| What does a test cross determine? | A test cross determines the genotype of an individual |
| What happens during the heating stage of PCR? | Two strands of DNA are seperated |
| Meiosis II | Sister chromatids fail to seperate Results in one cell that is n+1, n-1, and two normal cells NO crossing over |
| Meiosis I | Homologous chromosomes fail to seperate Results in four abnormal cells |
| complete dominance | when one trait over powers another ex: purple plant + white plant = purple plant |
| incomplete dominance | blending of two traits; both are equally powerful ex: mom w/ curly hair + dad w/ straight hair = son w/ wavy hair |
| codominance | both traits are fully expressed; each trait is shown ex: mom w/ blood type A + dad w/ blood type B = daughter w/ AB blood |
| allele | variation of a gene B or b |
| genotype | genetic makeup of an organism/DNA sequence Rr |
| gene | a protein coding region on a chromosome |
| homologous | matched pairs of chromosomes in a diploid cell |
| meiosis | special type of cell division the begins with a diploid cell and produces 4 haploid cells that are genetically different from each other |
| heterozygous | alleles in a diploid cell that are different |
| mitosis | results in 2 genetically identical cells |