April 06, 2009

Non Mendelian Genetics

Welcome Back from Spring Break!!!!

Today in class we:

Reviewed genetics quiz
Discussed Non-Mendelian patterns of inheritance
  • Incomplete dominance:

    A cross between a blue blahblah bird & a white blahblah bird produces offspring that are silver. The color of blahblah birds is determined by just two alleles.
    a) What are the genotypes of the parent blahblah birds in the original cross?
    b) What is/are the genotype(s) of the silver offspring?
    c) What would be the phenotypic ratios of offspring produced by two silver blahblah birds?

  • Codominance:

    A cross between a black cat & a tan cat produces a tabby pattern (black & tan fur together).
    a) What pattern of inheritence does this illustrate?
    b) What percent of kittens would have tan fur if a tabby cat is crossed with a black cat?

  • Multiple Alleles: href="file:///C:%5CDOCUME%7E1%5CMISSVI%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C02%5Cclip_filelist.xml">

    .A woman with Type O blood and a man who is Type AB have are expecting a child. What are the possible blood types of the kid?

    What are the possible blood types of a child who's parents are both heterozygous for "B" blood type?

Homework due Wednesday:
Complete practice problems for incomplete dominance and codominance patterns of inheritance
Read Blood Typing Lab and be prepared to begin work on lab

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