CB3

Cards (27)

  • Variation is the difference in characteristics between organisms.
  • Continuous data can be any value in a range.
  • Discontinuous data can only be a limited set of values.
  • Genetic variation is a result of different genes.
  • Environmental variation is a result of the environment.
  • Chromosomes are structures found in the nucleus of a cell which contains a long DNA molecule packed with protein.
  • Genes are sections of DNA that control a particular characteristic.
  • Alleles are the particular form of a gene.
  • A dominant allele can hide the effect of another allele.
  • A recessive allele does not show unless the dominant allele is absent.
  • Homozygous means having two identical alleles of a particular gene.
  • Heterozygous means having different alleles of a particular gene.
  • Genotype is the pair of alleles for a particular gene that a person has inherited.
  • Phenotype is the physical appearance or form of a characteristic.
  • A gamete is a haploid cell produced by meiosis used for sexual reproduction.
  • A zygote is a fertilised egg cell.
  • A genome is all the DNA in an organism.
  • Each cell contains a copy of the genome.
  • The complementary base pair to guanine is cytosine.
  • The complementary base pair to cytosine is guanine.
  • The complementary base pair to thymine is adenine.
  • The complementary base pair to adenine is thymine.
  • Hydrogen bonding occurs between the bases.
  • The backbone of the DNA structure is made from phosphate and sugar.
  • A haploid cell contains a single set of chromosomes.
  • A diploid cell contains two sets of chromosomes.
  • Meiosis occurs in the ovaries and the testes.