Biology Chapter 9

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Biology Chapter 9
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2011-03-14 14:56:21
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Biology Chapter
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Biology Chapter 9
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  1. Mendel’s law of segregation describes the:
    inheritance of a single character.
  2. Genes are found in alternative versions called ________
    alleles
  3. For each characteristic, an organism inherits two alleles, one from each parent; the alleles can be the same or different

    A homozygous genotype has_____ _____.

    A heterozygous genotype has two _______ _______
    identical alleles

    different alleles.
  4. Mendel’s law of segregation describes the inheritance of a single _______.
    character
  5. If the alleles differ, the ______allele determines the organism’s appearance, and the recessive allele has no noticeable effect
    dominant
  6. Law of ________: Allele pairs separate (segregate) from each other during the production of gametes so that a sperm or egg carries only one allele for each gene.
    segregation
  7. Crossing over of _______ chromosomes leads to production of recombinant gametes & increased variability in offspring.
    homologous
  8. Crossing over of homologous chromosomes leads to production of recombinant gametes & increased variability in offspring.

    BUT it is very important to know that genes on the _______ _________ tend to be inherited together
    same chromosome
  9. __________: expressed traits of an organism; what you can see
    Phenotype
  10. _________:the genetic make-up of an organis
    Genotype
  11. Mendel’s law of _______ ______ describes the inheritance of more than one character at the same time.
    independent assortment
  12. Mendel’s law of independent assortment describes the inheritance of more than one character at the same time.

    Each pair of _______ segregates independently of the other pairs of ________ during gamete formation.
    • alleles
    • alleles
  13. Incomplete dominance is:
    Combination of the dom and ressessive gene where both have a part, like red and white make a pink flower.
  14. _______- single gene controls multiple characteristicsi.e. mutated gene causing sickle cell anemia
    Pleiotropy
  15. ______ _______- multiple genes control a single characteristici.e. 6 genes for determination of skin color
    Polygenic Inheritance

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