Inheritance, Variation and Evolution

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Mitosis

  • Creates two identical daughter cells
  • each cell contains the same number of chromosomes
  • used for growth and repair
  • produces diploid cells

Meiosis

  • 4 different daughter cells
  • each contains a different mix of chromosomes
  • the same number of chromosomes
  • different ones duplicated from the parent cells
  • used for sexual reproduction
  • produces gametes
  • haploid cells

 

human meiosis

  • women - gametes are in the eggs
  • men - gametes are in the sperm

 

plant meiosis

  • eggs - stigma
  • pollen - stamen

 

          2n                4n                2n   2n        n  n  n  n       

Meiosis - Wikipedia          

(n) means the haploid number

(2n) means the diploid number

Asexual reproduction

  • found in bacteria/fungi and strawberry plants
  • mitosis
  • genetically identical
  • all daughter cells are the same

 

Sexual reproduction

  • .

Wednesday November 14, 2018- Pros and Cons | Mr. Bloch WWMS Room 312 

DNA

  • made from different bases that fit together
  • A - T
  • G - C
  • sugar-phosphate backbone
  • double helix structure

Gene

  • stretch of DNA
  • codes for a characteristic
  • GENES MEANS PROTEINS

Genome - All the genes in the body

  • every three-letter sequence of

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