1. If the allelic composition of a gene is Aa, the genotype is said to be (homozygous, heterozygous). What is the probability of having "a" allele in gametes? 2. For a genotype of AaBb, what are the possible allele compositions in gametes? 3. What are the possible genotypes and phenotypes ("A" phenotype or "a" phenotype) in the offspring of a monohybrid cross Aa x Aa?

7. Suppose a father of blood type A and a mother of blood type B have a child of type O.What are the possible genotypes of the mother and father? please draw the f1 in a paper and show the P and G

3. In fruit flies, red eyes (R) are dominant over purple eyes (r). Two red-eyed fruit flies were crossed, producing the following offspring: 76 red-eyed flies 24 purple-eyed flies a. What is the approximate ratio of red-eyed to purple-eyed flies? . b. Based on your experience with previous problems, what two genotypes give rise to this ratio?. c. What are the parents' genotypes?. d. What is the genotypic ratio of the F; offspring?. e. What is the phenotypic ratio of the F, offspring?

8. Construct a Punnett square for a cross between a heterozygous black guinea pig and a homozygous white guinea pig. a. What genotypes would you expect in the offspring? b. What percentage or ratio of each genotype would you expect in the offspring? C. What phenotypes would you expect in the offspring?

4. Listed below are the results from Mendel's crosses involving the texture of peas: P: smooth peas X wrinkled peas F,: all smooth F;: 5474 smooth and 1850 wrinkled What is the phenotypic ratio in the F2 generation ? (take the number of offspring in the largest category and divide it by the number of offspring in the smallest category) What can you conclude about the mode or pattern of inheritance ? Construct Punnett squares to support your conclusion.

1. In mice, black fur (B) is dominant over brown fur (b). Breeding a brown mouse and a homozygous black mouse produces all black offspring. a. What is the genotype of the gametes produced by the brown-furred parent? b. What genotype is the brown-furred parent? . c. What genotype is the black-furred parent? . d. What genotype is the black-furred offspring?. e. If two F, mice are bred with one another, what phenotype will the F, offspring be, and in what proportion? phenotype. proportion.

5. If individual IV-9 is a male, what is the probability that he would be affected with dark blue skin color?

17. Three recessive traits in aardwolf (a real animal) are stripe-less (s), dwarf (d), and fluffy mane (f). A stripe-less and fluffy female aardwolf mates with a dwarf male aardwolf to produce an F1 that is all WT (has stripes, normal size, and non-fluffy mane). When an F1 is test crossed to a fully recessive aardwolf, the following F2 are produced: Stripe-less, fluffy, normal sized 89 Striped, non-fluffy, dwarf 92 Stripe-less, non-fluffy, dwarf 1 Striped, fluffy, normal sized 2 11 13 19 20