Week 10, Session 1Chapter 14: Mendel and the Gene IdeaSupplemental InstructionIowa State UniversityLeader: KelseyCourse: Bio 211 (5)Instructor: Dr. HolscherDate: 10-26-091. What is a monohybrid cross?cross between 2 organisms examining 1 trait2. What is a dihybrid cross?cross between 2 organisms examining 2 traits3. What does it require for a dominant trait to be expressed?one dominant allele for trait4. What does it require for a recessive trait to be expressed?two recessive alleles for trait5. Give examples of the following (using big A’s and little a’s): Homozygous recessive: aa Homozygous dominant: AA Heterozygous: Aa6. Match the generation abbreviation to the proper step: True-breeding plant generation that Mendel crossed first __P____ First set of offspring ___F1_____ Second set of offspring that Mendel allowed to self-pollinate __F2____7. Two parents have a child. One parent is heterozygous for the trait, and one has blue eyes. Blue eye color is a recessive trait. What is the probability that their child will have blue eyes? What is the probability that their child will be a carrier for blue eyes? (hint: Punnett’s square!)Cross Bb with bb. 50% chance of blue eyes, 50% chance of being a carrier for blue eyes. (remember: carriers DON’T express the trait- they are heterozygous for the trait, meaning they have one dominant allele and one recessive allele)Supplemental Instruction1060 Hixson-Lied Student Success Center 294-6624 www.si.iastate.eduF2PF18. In turtles, (pretend that) smooth shells are dominant over bumpy shells. If one parent turtle is heterozygous and all of the offspring have smooth shells, what was the genotype of the other parent? What was the phenotype of the other parent? (hint: Punnett’s square!)parent: Ssoffspring: SS or SsOther parent must be SS in order for all offspring to have smooth shells. (try it with a Punnett’s square!)9. You have a cat with short fur (ff) and green eyes (Gg). What type of cross would you perform if this cat were to mate?dihybrid How many different types of gametes can your cat produce? What are they? 2 types- Gf and gf10. Your cat decides to mate with a cat with long fur (Ff) and green eyes (Gg). How many different types of gametes can this cat produce? What are they? 4 types- GF, Gf, gF,
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