Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 5, Problem 11EQ
A variegated trait in plants is analyzed using reciprocal crosses. The following results are obtained:
Explain this pattern of inheritance.
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In a cross involving polygenic inheritance, three (3) gene pairs control plant height. The shortest andtallest plants are 12 cm and 24 cm, respectively. What height should all F1s display if the shortest andtallest plants were crossed, assuming environmental factors are the same?
A plant with red flowers is crossed with a plant with white flowers and the resulting offspring have pink flowers. What type of inheritance pattern does this describe? If two plants with pink flowers are crossed, what will be the resulting phenotypes and in what ratio?
Show punnet squares if needed
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Chapter 5 Solutions
Genetics: Analysis and Principles
Ch. 5.1 - A female snail that coils to the left has...Ch. 5.1 - 2. What is the molecular explanation for maternal...Ch. 5.2 - 1. In fruit flies, dosage compensation is achieved...Ch. 5.2 - 2. According to the Lyon hypothesis,
a. one of...Ch. 5.2 - Prob. 3COMQCh. 5.3 - 1. In mice, the copy of the Igf2 gene that is...Ch. 5.3 - 2. A female mouse that is is crossed to a male...Ch. 5.3 - Prob. 3COMQCh. 5.3 - Prob. 4COMQCh. 5.4 - 1. Extranuclear inheritance occurs due to
a....
Ch. 5.4 - 2. A cross is made between a green four-o’clock...Ch. 5.4 - 3. Some human diseases are caused by mutations in...Ch. 5.4 - 4. Chloroplasts and mitochondria evolved from an...Ch. 5 - Define the term epigenetic inheritance, and...Ch. 5 - 2. Describe the inheritance pattern of maternal...Ch. 5 - A maternal effect gene exists in a dominant N...Ch. 5 - 4. A Drosophila embryo dies during early...Ch. 5 - 5. For Mendelian inheritance, the nuclear genotype...Ch. 5 - Suppose a maternal effect gene exists as a...Ch. 5 - Suppose that a gene affects the anterior...Ch. 5 - Explain why maternal effect genes exert their...Ch. 5 - As described in Chapter 22, researchers have been...Ch. 5 - 10. With regard to the numbers of sex chromosomes,...Ch. 5 - 11. What is a Barr body? How is its structure...Ch. 5 - Among different species, describe three distinct...Ch. 5 - 13. Describe when X-chromosome inactivation occurs...Ch. 5 - 14. Describe the molecular process of X-chromosome...Ch. 5 - Prob. 15CONQCh. 5 - 16. How many Barr bodies would you expect to find...Ch. 5 - 17. Certain forms of human color blindness are...Ch. 5 - A black female cat (XBXB) and an orange male cat...Ch. 5 - Prob. 19CONQCh. 5 - When does the erasure and reestablishment phase of...Ch. 5 - In what types of cells would you expect de novo...Ch. 5 - 22. On rare occasions, people are born with a...Ch. 5 - Genes that cause Prader-Willi syndrome and...Ch. 5 - Prob. 24CONQCh. 5 - What is extranuclear inheritance? Describe three...Ch. 5 - Prob. 26CONQCh. 5 - Among different species, does extranuclear...Ch. 5 - Extranuclear inheritance often correlates with...Ch. 5 - Prob. 29CONQCh. 5 - Prob. 30CONQCh. 5 - Which of the following traits or diseases is (are)...Ch. 5 - Prob. 32CONQCh. 5 - 33. Describe how a biparental pattern of...Ch. 5 - Figure 5.1 describes an example of a maternal...Ch. 5 - 2. Discuss the types of experimental observations...Ch. 5 - Prob. 3EQCh. 5 - As a hypothetical example, a trait in mice results...Ch. 5 - You have a female snail that coils to the right,...Ch. 5 - Prob. 6EQCh. 5 - 7. Figure 5.6 describes the results of...Ch. 5 - Prob. 8EQCh. 5 - In the experiment of Figure 5.6, why does a clone...Ch. 5 - Prob. 10EQCh. 5 - 11. A variegated trait in plants is analyzed using...Ch. 5 - 1. Recessive maternal effect genes are identified...Ch. 5 - Prob. 2QSDC
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- A plant with red flowers is crossed with a plant with white flowers and the resulting offspring have pink flowers. What type of inheritance pattern does this describe? If two plants with pink flowers are crossed, what will be the resulting phenotypes and in what ratio?arrow_forwardIn pea plants, flower color is determined by one gene with two alleles, with the allele coding for purple flowers (P) being dominant to the allele coding for white flowers (p). If two purple-flowered offspring resulting from a cross between homozygous dominant and white-flowered parents are crossed, what percentage of the progeny are expected to have the dominant phenotype?arrow_forwardIn pea plants, tall(T) is dominant over short (t). What are the genotypes and phenotypes of the offspring of a cross between a TT and a TT plant?arrow_forward
- A particular walnut rooster was crossed to a pea hen, and the progeny consisted of 12 walnut, 11 pea, 3 rose, and 4 single chickens. What are the likely genotypes of the parents?arrow_forwardA plant with yellow flowers was crossed with a plant with red flowers. The F1 progeny obtained had orange flowers. What is the inheritance pattern?arrow_forwardThe gene for tall is dominant over dwarf in the garden pea plant. If a heterozygous tall plant is crossed with a dwarf plant what would be the genotype and the phenotype of the offspring?arrow_forward
- What is a reciprocal cross? Suppose that a gene is found as a wildtype (functional) allele and a recessive mutant (nonfunctional)allele. What would be the expected outcomes of reciprocal crossesif a true-breeding normal individual was crossed to a true-breedingindividual carrying the mutant allele? What would be the results ifthe gene is maternally inherited?arrow_forwardIn sweet peas, gene C or P alone produces white flowers, the purple colour being due to the presence of both these factors. What will be the flower colour of the offsprings of the following crosses, in which genotypes of parents are given;a) A white flowered plant crossed with a purple produces offspring, of which three-eighth are purple and five-eighth white.arrow_forwardThe tiny blue-eyed Mary flower is often one of the first flowers seen in the spring in some regions of the United States. The flower is normally blue, but sometimes a white or pink flower variation is found. The following data were obtained after several crosses. A student claims that these flower colors are an inherited trait, and the F1 and F2 phenotypes of the flowers arising from the pink and white cross can best be explained by epistasis, where another gene product influences phenotype expression. This data supports this claim because in order to produce a __________ (pink, white, or blue) flower, a gene for a switch that 'turns on' the color gene would be recessive, meaning it has a mutation that causes it to be 'off'. In order to express a color, this switch needs to be in the dominant form. The color gene is a structural gene that has two variants: a dominant trait, ______ (pink, white, or blue) and a recessive _______ (pink, white, or blue) variety.arrow_forward
- Suppose a student performs a three-point test cross with mice involving mouse genes T, V and D. If the most abundant classes of progeny are TvD and tVd and the rarest classes are tvd and TVD which gene is in the middle and what is the genotype of each mouse involved in the cross?arrow_forwardConsider this cross in pea plants: Tt Rr yy Aa × Tt rr Yy Aa, whereT = tall, t = dwarf, R = round, r = wrinkled, Y = yellow, y = green,A = axial, a = terminal. What is the expected phenotypic outcomeof this cross? Have one group of students solve this problem bymaking one big Punnett square, and have another group solve it bymaking four single-gene Punnett squares and using the multiplication method. Time each other to see who gets done first.arrow_forwardIn yeast, the alleles for colony colour and tryptophan dependence are located on different chromosomes. But, if the alleles for colony colour and tryptophan dependence were closely linked on the same chromosome, inheritance of these traits _______follow Mendel’s Law of _______arrow_forward
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