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Genetics: The Science of Heredity

Terms : Hide Images
the passing on of traits from parent to off-spring
a characteristic that an organism can pass on to its offspring through its genes
an organism with two dominant or two recessive genes for a trait
the joining of a sperm cell and an egg cell
factors that control a trait; found on a chromosome
different form of a gene (ex. T or t)
trait always shows up when present; represented by a capital letter
trait is hidden when the dominant allele is present; represented by a lower case letter
a genotype with two different alleles
the likelihood an event will occur
tool or chart used to determine all the possible outcomed of a genetic cross; determines POSSIBLE genotype for offspring
combination of alleles (ex. Tt or Hh)
physical expression of genes (ex. tall or short)
two of the same alleles (ex. TT or tt)
two diferent alleles (ex. Tt or Hh)
alleles are neither dominant nor recessive; both phenotypes will be expressed
genes are carried on chromosomes from parent to offspring
process where chromosomes are reduced to half the number found in other body cells; forms sex cells - sperm and egg
genes linked together
Thymine
Cytosine
copies message directly from DNA; takes it to the ribosomes
takes amino acids to growing protein
causes cell to make change to the proteins its making; 3 types - substitution, deletion, addition

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