2. Fill in the blanks below using these choices: dominant, genes, genetics, heterozygous, pure, recessive, chromosomes, Punnett square. a. Chromosomes have parts that determine traits. These parts are b. A person having two genes that are alike is said to be c. A gene that prevents others from showing is said to be d. A gene that may not show up even though it is there is said to be e. Long rod-shaped bodies inside a cell's nucleus are called f. One who studies how traits are passed on is studying g. A person with one dominant and one recessive gene for a trait is h. A way to show which genes can combine when an egg and sperm join is a

Which of the following processes does not increase genetic diversity? a. parthenogenesis b. random DNA mutations c. genetic recombination d. independent assortment e. random combinations of paternal and maternalchromosomes

A recognized set of symptoms that characterize a genetic disorder is a(n) _______. a. syndrome b. disease c. abnormality d. inheritance pattern

A man has Simpson syndrome, an addiction to a certain television show. His wife does not have this syndrome. This couple has four children, two boys and two girls. One of the boys and one of the girls has this syndrome; the other children are normal. Can Simpson syndrome be an autosomal recessive trait? A sex-linked recessive trait?

SCIENCE, TECHNOLOGY, AND SOCIETY Imagine that you are a genetic counselor. What advice or suggestions might you give in the following situations? (a) A couple has come for advice because the woman had a sister who died of Tay-Sachs disease. (b) A young man and woman who are not related are engaged to be married. However, they have learned that the mans parents are first cousins, and they are worried about the possibility of increased risk of genetic defects in their own children. (c) A young womans paternal uncle (her fathers brother) has hemophilia A. Her father is free of the disease, and there has never been a case of hemophilia A in her mothers family. Should she be concerned about the possibility of hemophilia A in her own children? (d) A 20-year-old man is seeking counseling because his father was recently diagnosed with Huntingtons disease. (e) A 45-year-old woman has just been diagnosed with Huntingtons disease. She says she will not tell her college-age sons because of the burden it will place on them. Given that the woman, not her sons, is your client, do you have a duty to inform the sons? Explain your reasoning.

DNA____________. a. guides form and function c. is transmitted from parent to offspring b. is the basis of traits d. all of the above

Choose the statement that is incorrect. a. A son can inherit a recessive allele on an X chromosome from either parent. b. An individual may inherit three or more of each type of chromosome characteristic or the species, a condition called polyploidy. c. A female child inherits one X chromosome from her mother and one from her father. d. Pedigree analysis can be used to determine a future childs chance of being born with achcondroplasia.

Figure 13.4 Which of the following statements is true? Recombination of the body color and red/ cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. Recombination of the body color and aristae length alleles will occur more frequently than recombination of red/brown eye alleles and the aristae length alleles. Recombination of the gray/black body color and long/short aristae alleles will not occur. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.

DNA _______. a. guides form b. is the basis of traits c. is transmitted from and function parents to offspring d. all of the above

A life history pattern is a set of adaptations that influence an individual's_________. a. longevity b. fertility c. age at reproductive maturity d. all of the above