GENETICS(LL)-W/CONNECT >CUSTOM<
6th Edition
ISBN: 9781260571561
Author: HARTWELL
Publisher: MCG CUSTOM
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Textbook Question
Chapter 5, Problem 24P
A snapdragon with pink petals, black anthers, and long stems was allowed to self-fertilize. From the resulting seeds,
650 adult plants were obtained. The
78 red long tan
26 red short tan
44 red long black
15 red short black
39 pink long tan
13 pink short tan
204 pink long black
68 pink short black
5 white long tan
2 white short tan
117 white long black
39 white short black
a. | Using P for one allele and p for the other, indicate how flower color is inherited. |
b. | What numbers of red : pink : white would have been expected among these 650 plants? |
c. | How are anther color and stem length inherited? |
d. | What was the genotype of the original plant? |
e. | Do any of the three genes show independent assortment? |
f. | For any genes that are linked, indicate the arrangements of the alleles on the homologous chromosomes in the in the in the original snapdragon, and estimate the distance between the genes. |
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A snapdragon with pink petals, black anthers, and longstems was allowed to self-fertilize. From the resultingseeds, 650 adult plants were obtained. The phenotypesof these offspring are listed here.78 red long tan26 red short tan44 red long black15 red short black39 pink long tan13 pink short tan204 pink long black68 pink short black5 white long tan2 white short tan117 white long black39 white short blacka. Using P for one allele and p for the other, indicatehow flower color is inherited.b. What numbers of red : pink : white would havebeen expected among these 650 plants?c. How are anther color and stem length inherited?d. What was the genotype of the original plant?e. Do any of the three genes show independentassortment?f. For any genes that are linked, indicate the arrangements of the alleles on the homologous chromosomes in the original snapdragon, and estimate thedistance between the genes
Consider a corn plant dihybrid for the traits of purple and smooth kernels. When allowed to self-fertilize, 489
offspring are produced. How many of these offspring are expected to exhibit the traits of yellow and smooth
kernels?
Use the following information about pea plants:
S = spherical seeds; s = wrinkled seeds
Y = yellow seeds; y = green seeds
P = purple flowers; p = white flowers
I = inflated pods; i = constricted pods
Write the possible genotypes for the following conditions:
Heterozygous for spherical seeds
Homozygous for wrinkled seeds
Homozygous for spherical seeds and heterozygous for flower color
Chapter 5 Solutions
GENETICS(LL)-W/CONNECT >CUSTOM<
Ch. 5 - Choose the phrase from the right column that best...Ch. 5 - a. A Drosophila male from a true-breeding stock...Ch. 5 - Prob. 3PCh. 5 - The Punnett square in Fig. 5.4 shows how Mendels...Ch. 5 - In mice, the dominant allele Gs of the X-linked...Ch. 5 - In Drosophila, males from a true-breeding stock...Ch. 5 - If the a and b loci are 20 m.u. apart in humans...Ch. 5 - CCDD and ccdd individuals were crossed to each...Ch. 5 - In mice, the autosomal locus coding for the...Ch. 5 - In a particular human family, John and his mother...
Ch. 5 - Albino rabbits lacking pigment are homozygous for...Ch. 5 - In corn, the allele A allows the deposition of...Ch. 5 - If the a and b loci are 40 cM apart and an AA BB...Ch. 5 - Write the number of different kinds of phenotypes,...Ch. 5 - A DNA variant has been found linked to a rare...Ch. 5 - Figure 5.7a shows chromosomes during prophase of...Ch. 5 - Figure 5.7b shows bivalents in mouse primary...Ch. 5 - Cinnabar eyes cn and reduced bristles rd are...Ch. 5 - In Drosophila, the autosomal recessive dp allele...Ch. 5 - From a series of two-point crosses, the following...Ch. 5 - Map distances were determined for four different...Ch. 5 - In the tubular flowers of foxgloves, wild-type...Ch. 5 - In Drosophila, the recessive allele mb of one gene...Ch. 5 - A snapdragon with pink petals, black anthers, and...Ch. 5 - In Drosophila, three autosomal genes have the...Ch. 5 - Drosophila females heterozygous for each of three...Ch. 5 - Male Drosophila expressing the autosomal recessive...Ch. 5 - a. In Drosophila, crosses between F1 heterozygotes...Ch. 5 - A true-breeding strain of Virginia tobacco has...Ch. 5 - Prob. 30PCh. 5 - The following list of four Drosophila mutations...Ch. 5 - Do the data that Mendel obtained fit his...Ch. 5 - Two genes control color in corn snakes as follows:...Ch. 5 - A mouse from a true-breeding population with...Ch. 5 - Neurospora of genotype a c are crossed with...Ch. 5 - A cross was performed between one haploid strain...Ch. 5 - Prob. 40PCh. 5 - Prob. 41PCh. 5 - Indicate the percentage of tetrads that would have...Ch. 5 - Prob. 43PCh. 5 - This problem leads you through the derivation of a...Ch. 5 - a. In ordered tetrad analysis, what is the maximum...Ch. 5 - Prob. 46PCh. 5 - A single yeast cell placed on a solid agar will...Ch. 5 - Figure 5.29 shows mitotic recombination leading to...Ch. 5 - A diploid strain of yeast has a wild-type...Ch. 5 - In Drosophila, the yellow y gene is near the...Ch. 5 - Neurofibromas are tumors of the skin that can...Ch. 5 - Two important methods for understanding the...
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- A horticulturist runs a test cross with an offspring (F1 generation) purple plant from Question 8. The phenotypic frequencies of the resulting offspring are 50% white and 50% purple. What is the true genotype of this offspring (F1 generation) purple plant?arrow_forwardA certain plant has 3 un-linked gene pairs, which can be represented as AaBbCc. Upon self-fertilization what proportion of the progeny will display the dominant phenotype with respect to genes A and B and the recessive phenotype for "c"? 3/64 1/64 16/64 32/64 9164arrow_forwardSuppose a plant breeder is interested in growing flowers with white variegated leaves. She reads that the gene controlling the white variegation trait is carried the chloroplast DNA and shows maternal effect. If she combines pollen (sperm) plants with white variegated leaves with ovum (eggs) from plants with green leaw what percentage oi the offspring will have white variegated leaves? a) 0% O b) 25% O C) 50% d) 100%arrow_forward
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- In tomatoes, the red fruit color is completely dominant to yellow. Suppose a tomato plant homozygous for red is crossed with one homozygous for yellow and the progeny are allowed to self pollinate. What phenotypes do you predict in the F2 generation? a) 3 red: 1 yellow b) 9 red : 3 orange : 1 yellow c) 1 red : 2 orange : 1 yellow d) 1 red : 1 yellowarrow_forwardUse the following information about pea plants: S = spherical seeds; s = wrinkled seeds Y = yellow seeds; y = green seeds P = purple flowers; p = white flowers I = inflated pods; i = constricted pods Write the phenotype produced by the following genotypes: PP Pp SS ss SSPp IiPp IIPParrow_forwardA plant breeder wants to use selective breeding to produce corn with short stalks and a high mass of grain.He could use the following varieties of cor, A, Long stalks, high mass of grain, B, Short stalks, low mass of grain or c, Long Stalks, low mass of grain. What would the plant breeder need to do to make sure he always produced corn with a short stem and a high mass of grain? Describe three steps the breeder would use.arrow_forward
- Use the image to observe the results of a cross between a tall pea plant and a short pea plant. What phenotypes and proportions will be produced for the two crosses? P generation Tall Tt Gametes Tt F₁ generation T Fertilization Tt t Tall tt Short Tt Tall tt tt Short Conclusion (a) Short (b) Genotypic ratio 1Tt:1tt Phenotypic ratio 1 tall: 1 short Tall F₁ progeny backcrossed to the short parent Answer Bank one-fourth tall and three-fourths short one-half tall and one-half short three-fourths tall and one-fourth short Tall F₁ progeny backcrossed to the tall parent all tall all shorarrow_forwardCOU f) What kind of offspring can be produced if a red-flowered plant is crossed with a pink-flowered plant? Show your work. g) What kind of offspring is/are produced if a pink-flowered plant is crossed with a white-flowered plant? Show your work. hleodarrow_forwardIf a corn plant was heterozygous for kernel color and seed shape,what would be the genotype of the plant?arrow_forward
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