Bio chapter 14

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Bio chapter 14
2014-04-27 13:17:24

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  1. Law of Independent Assortment?
    Each pair of alleles segregates independently of each other pair of alleles during gamete formation
  2. Dihybrids/dihybrid cross?
    Heterozygous for 2 characters being followed in the cross
  3. Monohybrids/monohybrid cross?
    Heterozygous for one particular character being followed in the cross
  4. Important application of pedigree?
    To help calculate probability that a future child will have a particular genotype and phenotype
  5. Pedigree?
    Collected info about a familys history for a trait and assembling this info into a family tree describing traits of parents and children
  6. Genotype?
    Genetic makeup
  7. Phenotype?
    Observable traits
  8. Homozygous?
    An organism that has a pair of identical alleles for a character (breed true)
  9. Heterozygous? They produce?
    Organism with 2 different alleles for a gene

    gametes with different alleles (not true breeding)
  10. Crossing dominant homozygotes with recessive homozygotes, every offspring will have 2 different alleles
  11. 1/4 of F2 plants have 2 white flower alleles, what will they do?
    Express recessive trait (white color)
  12. 1/2 of F2 offspring have inherited one purple flower allele and one white flower allele, what color?
  13. In F2 offspring, what color will flowers be? 1/4 of plants have inherited 2 purple flower alleles
  14. Punnett Square?
    Predicts allele composition of offspring from a cross between individuals of known genetic makeup
  15. Ex of Law of Segregation?
    Egg or sperm gets only one of 2 alleles that are present in somatic cells making up the gamete
  16. Law of Segregation?
    2 alleles for a heritable character segregate during gamete formation and end up in different gametes
  17. Recessive allele?
    No noticeable effect on the organisms appearance
  18. Dominant allele?
    Determines organisms appearance
  19. 2 alleles at a particular locus can be? Ex?
    or differ as in ?
    • Identical, true breeding plants
    • f1 hybrids
  20. Alleles? Ex?

    what happens?
    • Alternat versions of a gene
    • purple flower allele and white flower allele (2 DNA sequence variations)

    each gene is a sequence of nucleotides at a locus. DNA at locus varies in nucleotide sequence