What would you tell this couple about the probability

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What would you tell this couple about the probability that their children will have the disease? What would you tell them about the probability that their children will be carriers of the disease? 7. What is an allele? How is an allele different from a gene? Give an example of a gene. Now give an example of two alleles for that gene. F 2 F 1 . F 1 F 1 F 1 8. In a dihybrid cross between individuals heterozygous for both traits, how many different genotypes are possible in the gen- eration? Assuming that both traits show dominance, how many different phenotypes are possible? 9. How many different types of gametes can be formed by individ- uals with a genotype of AABB? With a genotype of AaBb? 10. Which of Mendel’s laws is illustrated by a dihybrid cross? What does the law state? 11. How many different phenotypes can result from a cross between individuals heterozygous for five different traits? How are these different phenotypes important to the process of evolution by natural selection? 12. Assume a new allele, called q , arises by a mutation in the Q gene. A gamete that acquires the mutant q allele dies. Will this allele show up in the next generation? Illustrate your answer with a Punnett square. 13. In Mendel’s crosses, one of the two forms of the traits he studied was dominant to the other. Are all traits inherited in this way? Support your answer with an example. 14. In genetic terms, what does it mean to be “true breeding”? Use the information in Section 3-3 to determine whether mice with yellow fur could be true breeding.Why or why not? 15. Suppose Mendel had decided to study inheritance by using the trait of human height. How would his methods have been dif- ferent? Do you think he could have derived his principles of inheritance by using this trait? Why or why not? F 1
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