Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 2, Problem 4CONQ
With regard to genotypes, what is a true-breeding organism?
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Q. Is there epistasis among the genes that determine color in the corn seedlings? If so, which gene is epistatic and which is hypostatic?
Chapter 2 Solutions
Genetics: Analysis and Principles
Ch. 2.1 - 1. Experimental advantages of using pea plants...Ch. 2.1 - The term cross refers to an experiment in which a....Ch. 2.1 - 3. To avoid self-fertilization in his pea plants,...Ch. 2.2 - Prob. 1COMQCh. 2.2 - Prob. 2COMQCh. 2.3 - A pea plant has the genotype rrYy. How many...Ch. 2.3 - A cross is made between a pea plant that is RrYy...Ch. 2.3 - Prob. 3COMQCh. 2.4 - Which of the following would not be observed in a...Ch. 2.4 - Prob. 2COMQ
Ch. 2.5 - A cross is made between AABbCcDd and AaBbccdd...Ch. 2.5 - Prob. 2COMQCh. 2.5 - Prob. 3COMQCh. 2 - 1. Why did Mendel’s work refute the idea of...Ch. 2 - 2. What is the difference between...Ch. 2 - 3. Describe the difference between genotype and...Ch. 2 - 4. With regard to genotypes, what is a...Ch. 2 - 5. How can you determine whether an organism is...Ch. 2 - In your own words, describe Mendels law of...Ch. 2 - Based on genes in pea plants that we have...Ch. 2 - Prob. 8CONQCh. 2 - Do you know the genotype of an individual with a...Ch. 2 - 10. A cross is made between a pea plant that has...Ch. 2 - Prob. 11CONQCh. 2 - 12. Describe the significance of nonparentals with...Ch. 2 - For the following pedigrees, describe what you...Ch. 2 - Ectrodactyly, also known as lobster claw syndrome,...Ch. 2 - Identical twins are produced from the same sperm...Ch. 2 - In cocker spaniels, solid coat color is dominant...Ch. 2 - A cross was made between a white male dog and two...Ch. 2 - 18. In humans, the allele for brown eye color (B)...Ch. 2 - Albinism, a condition characterized by a partial...Ch. 2 - A true-breeding tall plant was crossed to a dwarf...Ch. 2 - 21. For pea plants with the following genotypes,...Ch. 2 - 22. An individual has the genotypeand makes an...Ch. 2 - 23. In people with maple syrup urine disease, the...Ch. 2 - Prob. 24CONQCh. 2 - 25. A true-breeding pea plant with round and Page...Ch. 2 - Prob. 26CONQCh. 2 - 27. What are the expected phenotypic ratios from...Ch. 2 - Prob. 28CONQCh. 2 - Prob. 29CONQCh. 2 - A pea plant that is dwarf with green, wrinkled...Ch. 2 - 31. A true-breeding plant with round and green...Ch. 2 - Wooly hair is a rare dominant trait found in...Ch. 2 - Huntington disease is a rare dominant trait that...Ch. 2 - 34. A woman with achondroplasia (a dominant form...Ch. 2 - 1. Describe three advantages of using pea plants...Ch. 2 - Explain the technical differences between a...Ch. 2 - 3. How long did it take Mendel to complete the...Ch. 2 - 4. For all seven characters described in the data...Ch. 2 - From the point of view of crosses and data...Ch. 2 - 6. As in many animals, albino coat color is a...Ch. 2 - 7. The fungus Melampsora lini causes a disease...Ch. 2 - For Mendels data for the experiment in Figure 2.8,...Ch. 2 - 9. Would it be possible to deduce the law of...Ch. 2 - In fruit flies, curved wings are recessive to...Ch. 2 - A recessive allele in mice results in an unusally...Ch. 2 - Prob. 12EQCh. 2 - Prob. 13EQCh. 2 - Prob. 14EQCh. 2 - 15. A cross was made between two strains of plants...Ch. 2 - A cross was made between two pea plants, TtAa and...Ch. 2 - Consider this four-factor cross: TtRryyAaTtRRYyaa,...
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- What is the maximum number of different alleles for a particular locus that can be present in a single diploid individual?arrow_forwardE. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny: 3583 green seedlings, 853 virescentwhite seedlings, and 260 yellow seedlings . Q. Give the genotypes for the green, virescent-white, and yellow progeny.arrow_forwardHow do the terms gene and allele, as used here, relate to the concepts of locus and gene pair?arrow_forward
- In corn (Zea mays), the wild type trait is for kernels to be round; some kernels are shrunken (S), which is caused by recessive, mutant alleles of various genes. You obtain five strains of corn with shrunken kernels, and conduct pairwise crosses between all five strains (1x1, 1x2, 1,3, etc). The results are summarized in the matrix below: if the offspring have the wild type trait, round, then they are represented with a "+"; if the offspring have the trait caused by recessive, mutant alleles, shrunken, they are marked with "S" 1 2 3 4 5 1 S 2 + S 3 + 4 5 + S S S S S S + + + S a. How many total genes are represented by these five strains? Explain your answer. b. Which of the five strains represent the same genes? (how can they be grouped, if at all). Explain your answer.arrow_forwardA cross is made between AaBbCc and aabbcc plants, and the offspring occur in the following numbers: 30 aaBbCc 15 aaBbcc 30 aabbCc 15 aabbcc 15 AaBbCc 30 AaBbcc 15 AabbCc 30 Aabbcc What is the arrangement of alleles on the homologous chromosomes of the heterozygous parent? Include map units.arrow_forwarda) In giraffes, long necks are dominont to Short necks &tall bodies are cominant to shart bodies- i) Mom is heterozygous for both trats & Dad is homozygousreccessive for both trait. a) ** what are the genotype & phenotype cof the progeny?arrow_forward
- E. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny: 3583 green seedlings, 853 virescentwhite seedlings, and 260 yellow seedlings . Q. Explain how color is determined in these seedlings.arrow_forwardHow much genotypic variation do you find in the randomly picked parents of your crosses?arrow_forwardA certain polled bull was bred to three cows. With cow A, which is polled, a horned calf was produced; with cow B, which is polled, a polled calf was produced; and with cow C, which is horned, a polled calf was produced. What are the genotypes of all these four animals [bull, cow A, cow B, and cow C], and what are the possible phenotypes and genotypes of the resulting offspring that you would expect from these three mating.arrow_forward
- What are the two different meanings of horizontal lines in a pedigree?arrow_forwardYou perform a cross between a parent with the genotype WWiiNNttEErr and another parent that is wwllnnTTeerr. All genes are unlinked except for W and I which are 22 mu apart. You take an F1 from this cross and cross it with an individual that is wwiiNntteerr. a) What is the probability that this final cross yields an offspring that is wwiinntteerr? b) What is the probability that this final cross yields an offspring that is NNTT or Nntt. (You can ignore all of the other genes for this question.)arrow_forwardWhat is a gene with only one common, wild-type allele?arrow_forward
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