lecture 1

Lecture 1 - chromosomes 8 Crossing Over two chromosomes which exchanges DNA exchange of genetic material More common in sister chromatids 9

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8/25/2008 ANSC 4018 1. DNA: basic genetic material; basic organic molecule that “stores” genetic makeup on all living organisms. Made up of nucleotides. 2. Homologous Chromosomes: a pair of similar chromosomes of diploid species. Humans have 23 pairs of homologous chromosomes (46 total). 3. Genes: a “location” on a chromosome; a segment of DNA on a chromosome. 4. Alleles: alternate or different form of the same gene on a chromosome (including gene location). An individual can possess 2 alleles. 5. Linkage: genes that occur on the same chromosome. 6. Dominance: an allele that is expressed more than the other. 7. Cell Division: “Mitosis or Meiosis.” -Mitosis: cell division where the new cell produced has copies of each pair of chromosome. -Meiosis: cell division where the new cell produced has copies of one of each pair of
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Unformatted text preview: chromosomes. 8. Crossing Over: two chromosomes which exchanges DNA; exchange of genetic material. More common in sister chromatids. 9. Recombination: recombining genes; act of crossing over.\ 10. Independent Assortment: process of meiosis; assort independently of assortment. 11. Non-Homologous Chromosomes: a pair of chromosomes which are not similar. 12. Phenotype: outward expression of a species (eye color, etc.). 13. Gamete: haploid; when two comes together, they form a diploid cell. 14. Zygote: diploid 15. Epistasis: when two or more genes act to produce a more suppressed gene function. 16. Homozygous: individuals whom possess 2 of the same genes. 17. Heterozygous: individuals whom possess different genes....
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This note was uploaded on 02/03/2009 for the course ANSC 4018 taught by Professor Hay during the Spring '09 term at LSU.

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