Biology

• What is the the part of the cell where all of the genetic information is found? (DNA, Chromosomes ect)

  the nucleus
• What is the definition of DNA

  A polymer made of 2 strands forming a double helix
• What is the definition of Evolution?

  The process of change in all forms of life over generations. It is a change in the inherited features over time
• What is Extinction?

  The complete disappearance of a species from the Earth.
• Why do humans use selective breeding on animals

  To make them more useful
• How does selective breeding work?

  humans breed plants/animals for particular characteristics
• What is a Genotype?

  The set genes in an animal/person
• What is a Phenotype?

  The observable characteristics or traits of an organism.
• Genes are short sections of DNA on a chromosome that contain a certain code for a particular sequence of Amino acids to make a specific person.
• What is Asexual reproductio?

  Asexual reproduction is a type of reproduction that does not involve the fusion of gametes (sex cells) and results in offspring that are genetically identical to the parent. It is only in need of 1 parent.
• Natural selection is the process by which the frequency of a particular allele in a population changes over time
• Stage 1 of natural selection is: there is a variation in a species caused by a random mutation.
• Stage 2 of natural selection is: gives some individuals a survival advantage (e.g. Camouflage)
• Stage 3 of natural selection is: these individuals will be more likely to survive, reproduce and pass their genes onto their offspring.
• Stage 4 of natural selection is: this means that the alleles they have will become more common in the next generation as it has been passed down from parents to children.
• Stage 5 of natural selection is: if this continues then eventually all members of the species may carry the new allele.
• The term 'natural' refers to the fact that the process occurs without human intervention or influence.
• Natural selection can lead to evolution because over time, the frequency of certain alleles increases within a population due to differential reproduction.