Paper 2 biology

• what does vroom my automobile stores gas stand for (classification by linnaus)


  variation, mutations, adaptation, selection, gene/generation (sometimes include isolation)
• What are the advantages of asexual reproduction?

  - only one parent needed

  - time and energy efficient

  - faster than sexual reproduction

  - many identical offspring can be produced when conditions are favourable
• what are disadvantages of asexual reproduction


  Identical to parent, limited adaptability, could face massive die off if environment changes
• what are advantages of sexual reproduction


  Diverse offspring, adaptability, can live in different environments
• what are disadvantages of sexual reproduction

  Too unique, time and energy required, smaller populations
• what are the bases of dna


  a,c,t,g
• what do these bases code for

  each sequence codes for a different amino acid
• which strands are complimentary to another


  a and t and c and g
• what is a dominant allele

  A form of a gene that is fully expressed, even when two different alleles are present
• what is a recessive allele


  An allele that is masked when a dominant allele is present
• what are the sex chromosomes in a female

  XX
• what are the sex chromosomes in a male

  XY