Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 20, Problem 4SQ
Summary Introduction
Introduction: Gene code for a particular trait. Genes are located on the chromosome. Linked genes are located very close together and they do not undergo crossing over in meiosis.
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Chapter 20 Solutions
Human Biology (MindTap Course List)
Ch. 20 - Prob. 1RQCh. 20 - What is a carrier of a genetic trait?Ch. 20 - What evidence indicates that a trait is coded by a...Ch. 20 - Prob. 4RQCh. 20 - Explain what nondisjunction is, and give two...Ch. 20 - _______ segregate during ______. a. Homologues;...Ch. 20 - Prob. 2SQCh. 20 - Genes on the same chromosome tend to stay together...Ch. 20 - Prob. 4SQCh. 20 - A chromosomes structure can be altered by _______....
Ch. 20 - Nondisjunction can be caused by ________. a....Ch. 20 - A gamete affected by nondisjunction could have...Ch. 20 - Genetic disorders can be caused by __________. a....Ch. 20 - A person who is a carrier for a genetic trait...Ch. 20 - Prob. 10SQCh. 20 - If a couple has six boys, what is the probability...Ch. 20 - Human sex chromosomes are XX for females and XY...Ch. 20 - People with Down syndrome have an extra copy of...Ch. 20 - Prob. 4CTCh. 20 - Prob. 5CTCh. 20 - About 4 percent of people of Northern European...Ch. 20 - The following pedigree shows the pattern of...
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- A test cross is performed to determine if a specific individual is a carrier. The results generate a 50/50 ratio of phenotypes. The test subject is therefore ________. A. Unable to reproduce B. Homozygous recessive C. Not following the rules of Mendelian genetics D. Homozygous dominant E. Heterozygousarrow_forwardThe probability of a crossover occurring between two genes on the same chromosome ________. a. is unrelated to the distance between them b. decrease with the distance between them c. increase with the distance between themarrow_forwardSuppose a woman has a recessive X-linked disease. Her husband doesnot have the disease. What is the chance that their second child has thedisease?a. 100% c. 25%b. 50% d. 0%arrow_forward
- Organism X has the genotype Ccdd. How many different types of gametes can it make and in what proportion? * A. 3 Cd 1 cd B. 1 CD: 1 Cd : 1 cD 1 cd C. 1 Cc : 1 dd D. 1 Cd 1 cd A human female "carrier" who is heterozygous for the recessive, sex-linked trait hemophilia (XHXH), marries a normal male (XHY). What proportion of their male progeny will show the trait? A. 1/4 B. 1/2 C. 0 D. Allarrow_forwardUse the product rule to determine the chance of obtaining an offspringwith the genotype Rr Yy from a dihybrid cross between parents withthe genotype Rr Yy.a. ½ c. 1/4b. ¼ d. 1⁄16arrow_forwardThe two main sources of genetic variation from meiosis are ________. a. random orientation of homologous pairs and mutation b. crossing over and random mutation c. random orientation of homologous pairs and crossing overarrow_forward
- A testcross is a way to determine_______ . a. phenotype b. genotype c. dominancearrow_forwardhybrid has two different genes for a given trait a. True b. Fasle If B indicates tallness then an organism with genes Bb will be short a. True b. False What is the result of meiosis l? a. two genetically identical cells b. four genetically different cells c. Two genetically different cells d. Four genetically identical cells In guinea pigs, black coat is dominant over white coat. To determine whether a black guinea pig is pure or hybrid black, it should be ideally phenotypically crossed with a; a. White guinea pig b. Black guinea pig c. Heterozygous guinea pig d. Homozygous dominant guinea pigarrow_forwardWebbed fingers is inherited as an X-linked disease An unaffected male marries an affected female. a. Draw a Punnett square of the possible offspring. b. List the phenotypes of the possible children c. Draw a pedigree that displays the inheritance in you Punnett squarearrow_forward
- The second-generation offspring of a cross between individuals who are homozygous for different alleles of a gene are called the_____ . a. F1 generation c. F2 generation b. hybrid generation d. daughtersarrow_forwardBaldness is a phenomenon where individuals lose hair as they grow older. As an X-linked recessive gene, what instances do females manifest this trait? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantarrow_forwardis a segment of DNA whose sequence of nucleotides codes for a 7. A protein. a. gene b. chromosome c. karyotype d. characteristic 8. A Is a graphic display of chromosomes, arranged by size and shape. a. genotype b. phenotype C. monotype d. karyotype 9. In purple people eaters, one-horn is dominant and no horns is recessive. Draw a Punnett Square showing the cross of a purple people eater that is heterozygous for horns with a purple people eater that does not have horns. Summarize the genotypes & phenotypes of the possible offspring. 10. Blood typing: a. The father of a child has type AB blood. The mother has type A. Which blood types can their children NOT have? b. A woman with type A blood and a man with type B blood could potentially have offspring with what blood types? c. The mother has type A blood. Her husband has type B blood. Their child has type O blood. The father claims the child can't be his. Is he right?arrow_forward
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