D. WHA 12. A male mouse heterozygous for both fur and eye colour mated with a female mouse heterozygous for both traits. Out of 64 offspring, how many mice can be expected to be heterozygous for both fur and eye colour? A. 16 B. 36 C. 1 D. 12 E. 48 F. 4

1. In guinea pigs, Cavia porcellus, the allele for short hair is dominant. A. Show the cross for a pure breeding short haired guinea pig and a long-haired guinea pig.         What percentage of the offspring will have short hair? _____________%     B. Show the cross for 2 heterozygous guinea pigs.                        What percentage of the offspring will have short hair?                 _____________%                What percentage of the offspring will have long hair?                                                                                      _____________%

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H T 7. Here is a cow genetic map: H= French horns h h = English horns C = chews cud c = swallows cud whole T= has tender meat; tastes good t = likes expensive watches; has good taste 40 cM Capital letters and small letters represent dominant and recessive, respectively, as usual. If this cow is test crossed, what % of the calves will be dominant for all 3 genes (has French horns, chews cud, and tastes good)? SHOW WORK.

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1. Chinchillas are small, furry South American rodents. They were originally brought to the United States from Chile in 1918 and raised for their fur, and have become increasingly popular as cage pets. They come in a variety of colors, but the most common is gray. In chinchillas, gray fur is dominant to violet. If one parent is gray HETEROZYGOUS, and the other is violet, what is the probability in their offspring of: being homozygous dominant? ________% being heterozygous? ________% being homozygous recessive? ________% having violet fur? ________% 2. Trixie, a former cheerleader, just had a child. She isn't sure who the father is. Carrie is blood type A and the baby is type AB. Use your knowledge of genetics to help Trixie, and indicate whether each of the following men COULD be the father. If he could be the father, put down Yes. If not, just say No, which is perhaps what Trixie should have done. #9, the quarterback, who is type A homozygous ______ #10, the…

8. In dihybrid crosses of heterozygous parents, the ratio 9:3:3:1 indicates ___. a. codominance                                  c. incomplete dominance b. independent assortment                 d. three alleles for each trait For the next four questions, use the following key: a = All the offspring will exhibit the dominant trait.       c = The recessive trait will show up in about 50% of the offspring. b = All the offspring will exhibit the recessive trait.       d = The dominant trait will show up in about 75% of the offspring. What will be the result if: 9. Bb mates with bb?              10. BB mates with bb?

Part B 1. For the remaining characteristics, you will be looking at homozygous and heterozygous traits. Each trait will be determined to be homozygous recessive, homozygous dominant, or hetero- zygous. Letters representing the alleles will be given to you; the uppercase letter is always dominant and the lowercase letter is always recessive. If both dice rolled are even numbers, it indicates homozygous dominant alleles; if both are odd, it indicates homozygous recessive alleles; if one is odd and the other even, it indicates heterozygous alleles. 2. Eyebrows: Use the alleles "A" and "a" for this trait. Two separate brows are the dominant trait, whereas the unibrow (or one continuous brow) is recessive. 3. Eye shape: Use the alleles "R" and "r" for this trait. Round eyes are the dominant trait; almond shaped eyes are recessive. 4. Hitchhiker's thumb: Use the alleles "H" and "h" for this trait. Straight thumbs are dominant; Hitchhiker's thumbs (the curving upward of the thumb) are…

3. Predict the phenotypic and genotypic ratios for crossing the following pea plants: A a. short x short b. short x true-breeding tall c. true-breeding tall x true-breeding tall

44. In pea plants, the tall phenotype is dominant to the dwarf phenotype. If a heterozygous pea plant is crossed with a homozygous tall pea plant, what is the probability that the offspring will be dwarf in size? A. 1 В. О С. 0.5 D. 0.25 45.A cross where we follow the inheritance of 2 pairs of alleles is called A. monohybrid. B. dihybrid. C. heterozygous. D. diallelic. 46. Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What are the genotypes of the gametes that are produced by a plant that is heterozygous for both traits? A. PT and pt B. P, p, T, and t C. PT, Pt, pT, and pt D. Tt, TT, tt, Pp. PP, and pp 47. During DNA replication, DNA pol III synthesizes the lagging strand in segments, called A. replication fragments. B. Chargaffs segments. C. replisomes. D. Okazaki fragments. 48. If a short sequence of DNA is 5' AATTGCCGT 3', its complement is A. 3' TTAACGGCT 5'. B. 3' TTAAGCCGA 5'. C. 3' TTAAGCCGU 5'. D. 3' TTAACGGCA 5'.