Genetics Assignment Name:
1. An organism is heterozygous for two pairs of genes. The number of different combinations of alleles that can form for these two genes in the organism s gametes is A. 1 B. 2 C. 4 D. 8 Use the following information to answer the next question 2. The reason that heterozygous females do not express the mutation is that A. nondisjunction occurs B. gene dominance occurs C. gene segregation occurs D. independent assortment occurs Use the following information to answer the next question. 3. What type of inheritance is demonstrated in Tay-Sachs disease? A. Autosomal recessive B. Autosomal dominant C. Sex-linked recessive D. Sex-linked dominant
Use the following information to answer the next question. 4. WNT2 and RELN are referred to as linked genes because they A. produce similar proteins B. are exchanged during meiosis C. have similar nucleotide sequences D. are located on the same chromosome Use the following information to answer the next two questions. NUMERIC RESPONSE 1 The order in which the four genes listed in the legend above are located on chromosome 6 is,,, and. (Record your four-digit answer in the numerical-response section on the answer sheet.) 5. What is the approximate cross-over frequency between the diabetes mellitus gene and the ragweed sensitivity gene? A. 1.5% B. 10.5% C. 15.0% D. 22.5%
Use the following information to answer the next two questions. 6. The genotypes of individuals II-6 and III-7 are identified in row NUMERIC RESPONSE #2 A woman who is heterozygous for faulty tooth enamel marries a man with normal tooth enamel. What is the probability that their first child will be a boy with normal tooth enamel? Answer: (Record your answer as a value from 0 to 1, rounded to two decimal places, in the numerical response section on the answer sheet.)
Use the following information to answer the next two questions. 7. The wirehaired kitten produced in the New York farm litter was the result of A. selective breeding B. a spontaneous mutation C. the mating of two cats that were heterozygous for the trait D. the mating of a cat that was homozygous recessive for the trait with a cat that was heterozygous for the trait 8. In order to select breeding stock for the wirehair trait, breeders try to determine which of the offspring are homozygous for the wirehair trait. To do this, they should perform a test cross of a potential breeding cat with a cat A. with the wirehair phenotype B. with a heterozygous genotype C. without the wirehair phenotype D. with a homozygous dominant genotype Use the following information to answer the next question. 9. Which part of the human cell would the researcher have studied in order to trace the ancestry of DNA unique to males? A. The X chromosome B. The Y chromosome C. RNA in the ribosomes D. DNA in the mitochondrion
Use the following information to answer the next three questions. 10. A possible genotype of individual IV-3 is A. ddee B. ddee C. DDee D. DdEe 11. Individuals III-1 and III-2 are expecting their seventh child. What is the probability of this child having deaf-mutism? A. 0.00 B. 0.25 C. 0.50 D. 0.75 NUMERIC RESPONSE #3 What is the probability of a couple that are heterozygous for both genes having a child with deafmutism? Answer: Record your answer as a value from 0 to 1, rounded to two decimal places, in the numerical response section on the answer sheet.)
Use the following information to answer the next three questions. 12. Individual III-1 has blood type A. His genotype could be A. I A i Hb A Hb S B. I A I A Hb S Hb S C. I A I B Hb A Hb S D. I A I A Hb A Hb A 13. If individual II-1 has blood type A and individual II-2 has blood type B, which of the following genotypes would be possible for their third child, if they had one? A. I A i Hb A Hb S B. I A I A Hb S Hb S C. I B I B Hb A Hb S D. I A I B Hb A Hb A 14. Which of the following rows indicates the relationship between the I A and I B alleles and the relationship between the I A and i alleles for the blood type gene?
Use the following information to answer the next two questions. 15. During meiosis, which of the following pairs of genes has the greatest chance of being separated by crossing over? A. (m) and (d) B. (ne) and (p) C. (m) and (lc) D. (p) and (o)
Use the following additional information to answer the next question. 16. The cross-over frequency between genes O and S is A. 6% B. 29% C. 31% D. 97% Use the following information to answer the next question. 17. With respect to the alleles for flower colour, these results indicate A. X-linked inheritance B. gene-linked inheritance C. dominant-recessive inheritance D. incomplete dominance inheritance
Use the following additional information to answer the next two questions. 18. The likely genotypes of the P1 plants for these two crosses is represented in row 19. Which of the following phenotypes is the predicted flower colour of M. jalapa with the genotype R P R? A. Yellow B. Orange C. Crimson D. Scarlet-red