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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- Red-green color blindness is a recessive trait in humans. The locus is on the X chromosome. If a color blind woman marries a normal vision man, what kind of children could they have? Group of answer choices A. color blind daughters, normal vision sons B. color blind sons, normal vision daughters C. all color blind D. all normal visionarrow_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_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_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_forwardJoe has classic hemophilia, an X-linked recessive disease. Could Joe have inherited the gene for this disease from the following people? Yes No a. His mother's mother b. His mother's father c. His father's mother d. His father's fatherarrow_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_forward
- Webbed 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_forwardThe 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_forwardThe flower color gene studied by Mendel affected three traits. This is an example of ________. a. pleiotropic genes b. codominant inheritance c. polygenic inheritancearrow_forward
- The characteristics that genes express, whether they are physical, behavioral, or biochemical, are a person's __________. Group of answer choices a.phenotype b.penetrance c.haplotype d.genotypearrow_forwardWhich of these genotypes is heterozygous?a. DD c. ddb. Dd d. Both a and c are correctarrow_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_forward
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