Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 13, Problem 7SQ
Summary Introduction
Concept introduction: Testcross and backcross are done to find out the unknown genotypes with the known
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A testcross is a way to determine_______ . a. phenotype b. genotype c. dominance
The symbol "F" in the results of a testcross stands for
A)recessive B)filialC)"faulty" or unexpected resultsD)first trait to show upE)dominant
The offspring of a monohybrid testcross would show the genotype(s)
A)AA and AaB)aa onlyC)AA, Aa, and aaD)AA onlyE)Aa and aa
Chapter 13 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 13 - A heterozygous individual has a _______ for a...Ch. 13 - An organisms observable traits constitute its...Ch. 13 - Prob. 3SQCh. 13 - The second-generation offspring of a cross between...Ch. 13 - Prob. 5SQCh. 13 - Refer to question 5. Assuming complete dominance,...Ch. 13 - Prob. 7SQCh. 13 - Prob. 8SQCh. 13 - The probability of a crossover occurring between...Ch. 13 - True or false? All traits are inherited in a...
Ch. 13 - Prob. 11SQCh. 13 - The phenotype of individuals heterozygous for...Ch. 13 - Prob. 13SQCh. 13 - Match the terms with the best description. ______...Ch. 13 - Assuming that independent assortment occurs during...Ch. 13 - Refer to problem 2. Determine the predicted...Ch. 13 - Refer to problem 2. Assume a third gene has...Ch. 13 - Prob. 4GPCh. 13 - Suppose you identify a new gene in mice. One of...Ch. 13 - Mendel crossed a true-breeding pea plant with...Ch. 13 - Several alleles affect traits of roses, such as...Ch. 13 - Prob. 1DAACh. 13 - Prob. 2DAACh. 13 - Prob. 3DAACh. 13 - Mutations in the TYR gene may render its enzyme...Ch. 13 - In sweet pea plants, an allele for purple flowers....Ch. 13 - Red-flowering snapdragons are homozygous for...Ch. 13 - A single allele gives rise to the Hbs form of...
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- What is the reason for doing a test cross? a. to identify heterozygous individuals with the dominant phenotype b. to determine which allele is dominant and which is recessive c. to identify homozygous recessive individuals in the F2 d. to determine if two genes assort independentlyarrow_forwardThe pedigree below represents an autosomal recessive disease. What characteristic(s) of the pedigree supports this statement? Write the genotypes and their genotype probabilities in fractions and percentagesarrow_forwardWhich of the following is a phenotype? a. Aa b. red hair c. Heterozygous d. DNAarrow_forward
- Two normal-looking fruit flies were crossed, and, in the progeny, there were 202 females and 98 males.a. What is unusual about this result?b. Provide a genetic explanation for this anomaly.c. Provide a test of your hypothesis.arrow_forwardThe genotype XXY corresponds to: a. Klinefelter syndrome b. Turner syndrome c. Tripto-X d. Jacob syndromearrow_forwardMaple syrup urine disease is an autosomal recessive gene. The R allele leads to a normal protein product, whereas r leads to a mutant protein. Which genotype below will display the Maple syrup urine disease phenotype? A. Rr B. RR C. rr D. Rr and rrarrow_forward
- Answer choices are: A.Two different STRs on the same chromosome B.The two alleles of that particular STR the individual has; one from mom, the other from dad C.Two different STRs on different chromosomesarrow_forwardMr. and Mrs. Flynn are concerned because their new baby doesn't resemble either of them and has type O blood. Mr. Flynn is type A and Mrs. Flynn is type B. They're sure that it's impossible to have a baby with a different blood type than the parents, and so they conclude that a mistake has been made. Are they correct? Explain your answer. Be specific. Use the correct blood alleles (IA, IB, i) in your explanation. genotypes:arrow_forwardWhy is there no trait (letter) on the y chromosome for males in this pedigree? A. Because the trait is X-linked (on the X chromosome) B. Because Ms. Premo made a mistake C. Because we never write anything on the y chromosomearrow_forward
- a) A woman who is type A has a daughter who is type O. Give the genotypes of both the mother and of the daughter. b) The mother claims a man who is type B is the father. Is that possible? Explain. c) The accused man can prove that both of his parents are type AB. Is it possible for him to be type B? If so, what is his genotype? d) Does the answer in part c change the answer in part b?arrow_forwardIf a Mother's genotype is IAi and her Daughter's genotype is ii and the mother claims a man who is type B as the father... a) Is that possible? Explain. b) The accused man can prove that both of his parents are type AB. Is it possible for him to be type B? If so, what is his genotype? Explain. d) Does the answer in part c change the answer in part b? Explain.arrow_forwardA man with blood type A and a woman of blood type B have a baby girl of blood type O. The man sues his wife for divorce, on the grounds that it is not possible for the baby to be theirs (since the blood type is not A, B. or AB). Evaluate the lawsuit on the basis of genetics (A, B alleles are co-dominant over the recessive O allele). IA = A allele IB = B allele iO = O allelearrow_forward
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