Non-Mendelian Inheritance -- Practice Problems
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Science 10Name ______________________Date ___________________Non-Mendelian Genetics WorksheetTask: Complete each Punnett Square and any accompanying questions. 1. In plants known as “four o’clocks”, the allele for the dominant red-flower color is incompletely dominant over the allele for white-flowers. A gardener allows several heterozygous pink-flowered four o’clocks to self-pollinate and collects 200 seeds.Draw a Punnett square for the cross. Identify the flower color phenotypes and theoretical percentage. Phenotype Percentages __________* _______________* _______________* _____-304800142240002. In shorthorn cattle, hair colour is governed by co-dominant alleles. Red alleles are co-dominant with white alleles, and heterozygotes have red and white hairs. They are called roans. Cross two roans. What is the probability of having a white offspring?-1143005080003. In rabbits, white coat color (CW) and black coat color (CB) are co-dominant, and both of these alleles are dominant over albino (c); heterozygotes (CWCB) are spotted.Draw a Punnett Square that shows the genotypes and phenotypes of the offspring from a heterozygous, black-coated (CBc) rabbit and a homozygous, white-coated rabbit?4. Mrs. Eryth is homozygous for normal clotting factors (not hemophiliac) and Mr. Eryth has hemophilia. Remember, hemophilia is a sex-linked trait.Draw a Punnet square that shows the theoretical genotypes and phenotypes among their children.B. They actually have 4 male and 4 female children; how many of would be expected to be hemophiliacs, carriers, and normal?# hemophiliac#carrier# normal : _____ _____ _____ #: _____ _____ _____-36195062230005. If several pea plants with the genotype TTYy are crossed with pea plants with the genotypeTtyy, what percentage of the offspring will be expected to have the TTYy allele combination?-342900127635006. A man with blood type A had a father whose blood type was O. The man marries a woman whose blood type is AB.a) What are the genotypes of the man and of his father?man: ____________father: ______________b) What are the possible blood types of this couple's children?7. A woman who is homozygous for blood type B had a father who was heterozygous for blood type B. The woman marries a man who is blood type O.a) What could have been the possible genotypes of the woman's mother? ____________________________________________b) What are the possible blood types of this couple's children?8. Determine the pattern of inheritance for the following pedigree. Use the letter "F" or "f" to represent fur colour. a) Which characteristic is dominant? _________________ Which characteristic is recessive? _________________b) Determine the genotypes of all the individuals. For some, you will only be able to determine one allele of the genotype, so just write the one capital allele followed by a dash (F_ ). You will end up with three (F_ ). ................
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