Chapter 4 Part 3

Chapter 4 Part 3 - Cell division and cancer 9/19 and 9/21...

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Unformatted text preview: Cell division and cancer 9/19 and 9/21 What is heredity and how is this indicated by ones karyotype? How do we pass our genetic heritage on to the next generation? When is genetic information NOT passed on to the next generation? How much time does it take for a cell to divide? How do somatic cells divide in the body? How do we form the egg and sperm? Why do we get cancer? What do we do to treat cancer? Complimentary binding of bases on two complimentary nucleotides (GC and AT) across the DNA double helix of two single strands of complimentary DNA. What are genes? What are genetic loci? What are traits? What are alleles? Alleles can be Dominate vs Recessive What is penetrance? Polygenetic Trait : several genes responsible for one trait Pleiotropic Gene: one gene responsible for several traits Sex-linked traits: Why are men more likely to get a sex linked genetic disorder? Consider hemophilia and the X-chromosome Why are children born to older parents more likely to be born with genetic abnormalities? Heredity is the passage of genetic characteristics to offspring. Most human cells have 46 chromosomes: a karyotype lets us see these chromosomes visually. Humans have 46 chromosomes= 23 pairs Each chromosome of a pair is a homologous chromosome (one strand of dsDNA X 2) We have 22 autologous chromosomes We have one sex-chromosome It is either two X-chromosomes Or a X and a Y chromosome Genotype: what we could become based on our genes There are about 35,000 genes found human DNA Each gene can make one or several proteins...
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Chapter 4 Part 3 - Cell division and cancer 9/19 and 9/21...

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