A&P Seeley 3.4

  1. Gametes
    Sex cells
  2. Genotype
    The genes for a given trait
  3. Phenotype
    The expression of the genotype
  4. Alleles
    Alternate forms of genes
  5. Homozygous
    If the two alleles for the trait are identical
  6. Heterozygous
    If the two alleles for the trait are different
  7. Somatic cells
    All the cells of the body except the gametes
  8. Diploid number
    The normal number of chromosomes in a somatic cell
  9. Haploid number
    The normal number of chromosomes in a gamete
  10. Homologous pairs
    Chromosome pairs
  11. Homolog
    Each member of a homologous pair
  12. Genome
    Consists of all the genes found in the haploid number of chromosomes from one parent
  13. Locus
    A location on a chromosome where each gene of the genome occupies
  14. Multiple alleles
    Alleles exist in multiple forms
  15. Allelic variant
    • aka mutated allele or polymorphism
    • A different form of an allele
  16. PKU
    An autosomal recessive trait with multiple alleles
  17. Codominance
    Two alleles at the same locus are expressed so that separate, distinguishable phenotypes occur at the same time
  18. Incomplete dominance
    The dominant allele does not completely mask the effects of the recessive allele in the heterozygote
  19. Beta thalassemia
    A disorder of a gene on chromosome 11
  20. Major thalassemia
    A homozygous recessive condition where two abnormal alleles are present and much lower than normal amount of b-globulin polypeptide chains are synthesized
  21. Anemea
    A deficiency of hemoglobin in the blood
  22. Minor thalassemia
    One normal allele and one abnormal allele are present
  23. Polygenic traits
    Results from the interaction of many genes
  24. Sex-linked traits
    Traits affected by genes on the sex chromosome
  25. Meiosis
    Gametes are produced that have one homolog from each of the homologous pairs of chromosomes
  26. Mutagens
    Agents that cuase mutations
Card Set
A&P Seeley 3.4
Anatomy & Physiology text, Seeley, Ch 3 Cell Biology & Genetics, part 4/4