biology

• BIZOQU


  The nervous system
• Central nervous system


  • Brain
  • Spinal cord
• Stimulus


  Sensory input
• Sense organs


  • Eye
  • Ear
  • Nose
  • Tongue
  • Skin
• Eye

  Senses light
• Ear


  Senses sound
• Nose


  Senses chemicals in air
• Tongue

  Senses chemicals in food
• Skin


  Senses touch and temperature
• Reflex actions


  1. Protect

  2. Automatic

  3. Fast
• Senses


  Abilities that allow us to perceive and experience the world around us. There are five main senses: sight, hearing, touch, taste, and smell.
• Sound


  A type of sensation that is produced when our ears detect vibrations in the air. These vibrations are created by objects moving back and forth, such as when someone speaks or a guitar string is plucked.
• DNA


  Genetic material
• Genetics


  Study of heredity and variation in living organisms
• Alleles

  Two forms of the same gene
• Genotype

  Genetic makeup of an organism
• Dominant

  Allele that is expressed in the phenotype
• Recessive

  Allele that is hidden in the phenotype
• Homozygous

  Having two identical alleles for a gene
• Heterozygous

  Having two different alleles for a gene
• Blaggy


  DNA and inheritance
• Genetics


  You have two genes for each characteristic
• Alleles


  Two forms of the same gene
• Genotype


  A dial of letters
• Phenotype


  Is shown because of genotype
• Dominant


  • Shows in phenotype (BOID)
• Recessive


  • Will be hidden (small)
• Homozygous


  Two alleles for genes (identical)
• Heterozygous


  Two alleles (different)
• DNA


  Backbone of alternating sugar and phosphate units, twisted into a double helix
• Base pairs


  Joined bases, holding the two chains together
• Nucleotide


  Repeating units containing sugar, phosphate and a base
• Bases


  • A
  • T
  • G
  • C
• Apple Tart


  • 1 chocolate gato
• DNA and inheritance


  Genetic information is passed from parents to offspring
• Human cells contain 46 chromosomes
• Human sex cells contain 23 chromosomes (gametes)
• The number of chromosomes in egg and sperm are half the number in a normal cell
• This is so when they join together in fertilisation the offspring will have the correct number of chromosomes
• DNA is made up of two long chains of alternating sugar and phosphate molecules connected by bases, twisted into a double helix