MARIETTA BIOL 101 - Nonmendelian assignment (4 pages)

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Nonmendelian assignment



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Nonmendelian assignment

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Problems/Exams


Pages:
4
School:
Marietta College
Course:
Biol 101 - Modern Biology

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Name Non Mendelian Inheritance Practice Problems 10 points Work must be neatly done Be sure to make dominant and recessive alleles clearly distinguishable Punnett squares should show genotypes and phenotypes Make Punnett squares only as big as needed to show ratios If I struggle to understand there will be a deduction Draw Punnett squares here 1 In plants known as four o clocks the allele for the dominant red flower color is designated as F and is incompletely dominant over the allele for white flowers f A horticulturist allows several heterozygous pink flowered four o clocks to self pollinate and collects 200 seeds Draw a Punnett square for the cross and then identify the flower color phenotypes and theoretical percentage and number of plants expected from these seeds Phenotype 2 In mice yellow coat color is carried by the allele Z is incompletely dominant over the z allele The heterozygote has brown fur A research lab mates 10 heterozygous mice and among the offspring 42 have brown fur and 19 have yellow fur A Draw a Punnett square for the cross that shows this cross B Why does a 2 1 rather than a 1 2 1 ratio result from this cross 3 Skin color in humans is determined by a polygenic inheritance system possibly involving involving as many as 9 genes For simplicity let s consider the influence of 3 genes A B and C where the dominant allele darkens skin color Suppose a women who is AABbCc mates with a man who is AaBbcc A List all of the possible genotypes of the gametes that could be produced by each the parents B Draw a Punnett square that shows the genotypes possible and number each genotype from lightest 1 to darkest skin coloration C In this cross how many dominant alleles will children with the darkest skin coloration possess and what theoretical fraction of the children will have this coloration of alleles fraction 4 In rabbits white coat color CW and black coat color CB are codominant and both of these alleles are dominant over albino c heterozygotes CWCB are



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