Biology - Chpt 2 and Chpt 12

• There are ___ chromosomes in our body?

  46
• How many pair of chromosomes do we have?

  23
• Mitosis

  A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus
• What is the cell cycle? (stage 1)

  Replication of DNA which form two copies of each chromosomes
• What is the cell cycle? (stage 2)

  Mitosis (nucleus division)
• What is the cell cycle? (stage 3)

  Cell divides into 2
• As cells grow and develop they begin to ____

  differntiate
• Unspecialized cells are know as _____

  Stem cells
• Producing identical offspring is know as _____

  cloning
• An egg and sperm cell fuse to form a 


  zygote
• There are 2 different ways of reproducing 


  asexual reproduction and sexual reproduction
• What are the 4 genetic terms


  homozygote, heterozygote, genotype and phenotype
• Causes of Polydactyly


  Genetic factors, environmental factors, or a combination of both
• Treatment of Polydactyly


  Surgery is often performed to remove the extra digits, improving aesthetics and function
• Incidence of Polydactyly


  About 1 in every 500 to 1 in every 1,000 individuals
• Polydactyly


  A congenital anomaly characterized by the presence of extra fingers or toes.