Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 19, Problem 25P
Cytoplasmic male sterility (CMS) in plants has been exploited to produce hybrid seeds (see Experimental Insight
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What genotypes and
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In an intra-species cross performed in mustard plants of two different species (Brassica juncea and Brassica oleracea), a tall plant (TT) was crossed with a dwarf (tt) variety in each of the two species. The members of the F1 generation were crossed to produce the F2 generation. Of the F2 plants, Brassica juncea had 60 tall and 20 dwarf plants, while Brassica oleracea had 100 tall and 20 dwarf plants. Use chi-square analysis to analyze these results.
In some plants a red flower pigment, cyanidin, is synthesized from a colorless precursor. The addition of a hydroxyl group (OH-) to the cyanidin molecule causes it to become purple. In a cross between two randomly selected purple varieties, the following results were obtained: 94 purple 31 red 43 white How many genes are involved in the determination of these flower colors? Which genotypic combinations produce which phenotypes? Diagram the purple * purple cross.
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Chapter 19 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
Ch. 19 - 17.1 Reciprocal crosses of experimental animals or...Ch. 19 - 17.2 How are some of the characteristics of the...Ch. 19 - 17.3 The human mitochondrial genome encodes...Ch. 19 - What is the evidence that transfer of DNA from the...Ch. 19 - Draw a graph depicting the relative amounts of...Ch. 19 - Prob. 6PCh. 19 - 17.7 What is the evidence that the ancient...Ch. 19 - 17.8 Outline the steps required for a gene...Ch. 19 - 17.9 Consider the phylogenetic tree presented in...Ch. 19 - Most large protein complexes in mitochondria and...
Ch. 19 - What insights have analyses of human mitochondrial...Ch. 19 - You are a genetic counselor, and several members...Ch. 19 - A mutation in Arabidopsis immutans results in the...Ch. 19 - What type or types of inheritance are consistent...Ch. 19 - You have isolated (1) a streptomycin-resistant...Ch. 19 - You have isolated two petite mutants, pet1 and...Ch. 19 - 17.15 Consider this human pedigree for a vision...Ch. 19 - A 50- year - old man has been diagnosed with MELAS...Ch. 19 - 17.17 The first person in a family to exhibit...Ch. 19 - Prob. 20PCh. 19 - Prob. 21PCh. 19 - 17.19 What is the most likely mode of inheritance...Ch. 19 - 17.20 In , the Russian Tsar Nicholaswas deposed,...Ch. 19 - 17.21 The dodo bird (Raphus cucullatus) lived on...Ch. 19 - Cytoplasmic male sterility (CMS) in plants has...Ch. 19 - 17.23 Wolves and coyotes can interbreed in...Ch. 19 - Prob. 27PCh. 19 - Prob. 28P
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- Suppose a species of tulip has three alleles for the gene that codes for flower color. The CR allele produces red tulips, the CB allele produces blue tulips, and the CW allele produces white tulips. Both CR and CB are dominant over CW, but CR and CB are incompletely dominant with each other, so CRCB heterozygotes have purple flowers. What is the expected phenotypic ratio in the offspring of the following crosses, in the order red : blue : purple : white? Enter your answers as the most simplified ratio (e.g. 1 : 2 : 1 : 1 instead of 2 : 4 : 2 : 2). Enter 0 if none of the offspring from a cross will be a particular color. CRCB × CBCW _____ red : ______blue : ______purple : ______white CRCB × CRCW - _______red : _____blue : _____purple : _____white CRCW × CBCW - _____red : _____blue : _____purple : _____white CRCB × CRCB - red : blue : purple : whitearrow_forwardIn a diploid plant species, an F1 with the genotype Mm Rr Ss is test crossed to a pure breeding recessive plant with the genotype mm rr ss. The offspring genotypes are as follows: Genotype Number Mm Rr Ss 687 Mm Rr ss 5 Mm rr Ss 68 Mm rr ss 196 mm Rr Ss 185 mm Rr ss 72 mm rr Ss 8 mm rr ss 679 Total 1900 1. What is the gene order of these linked genes?arrow_forwardA homozygous strain of corn that produces yellow kernels is crossed with another homozygous strain that produces purple kernels. When the F1 are interbred, 197 of the F2 are yellow and 153 are prurple. Give the genotypes of the yellow and purple F2 and propose a genetic model that explains the inheritance of these kernel colors in corn.arrow_forward
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- The genes for tall vine D and yellow seed G, are dominant over their respective alleles for dwarf d and green g. What phenotypes are expected from each of the following crosses? Include phenotypic and genotypic ratio. Use Punnet square to show the ff. Crosses. a. Heterozygous tall, homozygous yellow X Homozygous Tall, heterozygous yellow. b. Homozygous Dwarf, heterozygous yellow X Heterozygous tall, homozygous greenarrow_forwardIn the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2 (purple), and rp (green). Red is dominant over purple and green, and purple is dominant over green (Rp1 > Rp2 > rp). Give the expected phenotypes and ratios of offspring produced by the following crosses. a. Rp1/ Rp2 × Rp1/ rp b. Rp1/ rp × Rp2/ rp c. Rp1/ Rp2 × Rp1/ Rp2 d. Rp2/ rp × rp/ rp e. rp/ rp × Rp1/ Rp2arrow_forwardIn Drosophila, a cross was made between a yellow-bodied male with vestigial wings and a wild-type (WT) female(brown body and normal wings). The F1 generation consisted of WT males and WT females. The F1 males and females were crossed, and the F2 progeny consisted of 16 yellow males with vestigial wings, 48 yellow males with WT wings, 15 brown males with vestigial wings, 49 WT males, 31 brown females with vestigial wings, and 97 WT females. Based on these results, explain the inheritance of the two genes (i.e. autosomal or sex-linked, dominant or recessive).arrow_forward
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