Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780133910605
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 45.2, Problem 1TC
Summary Introduction
To determine:
Why natural selection favors individuals whose male and female flowers bloom at different times.
Introduction:
The term “natural selection” was given and popularized by Charles Darwin. Simply, it is defined as “survival of the fittest”. It is the differential survival of organisms on the basis of their
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A heterozygous plant with genotype Aa self-pollinates, and then its offspring also self-pollinate. Find the probability that the offspring of the offspring are tall for the following genetics systems. Half of heterozygous plants and one fourth of homozygous plants are tall (it depends on their position in the greenhouse).
Consider the following case of blending inheritance. A population of plants starts out with an equal number of individuals of heights 40 and 60 cm. The parents mate randomly, and the height of an offspring is exactly equal to the average height of its parents. What is the probability that a 60-cm tall plant mates with a 60-cm tall plant, and the probability that a 40-cm tall plant mates with a 60-cm tall plant?
Suppose a plant is heterozygous with genotype Aa. What is the probability that the allele that came from the pollen is type A? What is the probability that the allele that came from the ovule is type A?
Chapter 45 Solutions
Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
Ch. 45.1 - Prob. 1CYLCh. 45.1 - diagram the life cycles of ferns and flowering...Ch. 45.2 - Prob. 1CSCCh. 45.2 - diagram the structure of a complete flower and...Ch. 45.2 - During finals week in the spring semester, a...Ch. 45.2 - Prob. 1TCCh. 45.2 - Prob. 2CYLCh. 45.2 - explain the processes of pollination and double...Ch. 45.3 - explain how the parts of a flower develop into the...Ch. 45.3 - Prob. 1HYEW
Ch. 45.3 - describe the differences between monocot and dicot...Ch. 45.4 - explain why many seeds undergo dormancy before...Ch. 45.4 - Prob. 2CYLCh. 45.5 - The warmth of hot flowers attracts pollinators and...Ch. 45.5 - Prob. 1CYLCh. 45.5 - Prob. 1TCCh. 45.5 - Prob. 2TCCh. 45.6 - Prob. 1CSCCh. 45.6 - Prob. 1CYLCh. 45.6 - Why doesnt mistletoe simply drop its seeds?Ch. 45.6 - describe how fruit structures aid in seed...Ch. 45.6 - Prob. 2TCCh. 45.6 - Heat-producing flowers are rare, and many are...Ch. 45 - Prob. 1ACCh. 45 - Prob. 1FIBCh. 45 - Prob. 1MCCh. 45 - Diagram the general plant life cycle. Which stages...Ch. 45 - Prob. 2ACCh. 45 - In a flowering plant, the male gametophyte is the...Ch. 45 - Prob. 2MCCh. 45 - Prob. 2RQCh. 45 - Prob. 3ACCh. 45 - Prob. 3FIBCh. 45 - Prob. 3MCCh. 45 - Prob. 3RQCh. 45 - Prob. 4FIBCh. 45 - Which of the following is True? a. Moth-pollinated...Ch. 45 - Prob. 4RQCh. 45 - Prob. 5FIBCh. 45 - Prob. 5MCCh. 45 - Prob. 5RQCh. 45 - Describe the characteristics you would expect to...Ch. 45 - Prob. 7RQCh. 45 - Describe three mechanisms whereby seed dormancy is...Ch. 45 - Prob. 9RQCh. 45 - Describe three types of fruits and the mechanisms...
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- A botanist is studying the genetics of a particular species of plant. She knows that one plant may contain hundreds of individual seeds, each resulting from a separate fertilization event. She determines that a single gene controls seed color with two alleles-the dominant allele results in black seeds, and the recessive allele results in brown seeds. The botanist crosses a homozygous dominant plant with a heterozygous plant in a follow-up experiment. Which of the following is the best prediction for the percentage of brown seeds that would result from this cross? O 50% 25% O 100% O 0%arrow_forwardThe crab spider, Thomisus spectabilis, sits on flowers and preys upon visiting honeybees. Do honeybees distinguish between flowers that have crab spiders and flowers that do not? To test this, Heiling et al. (2003) gave 34 bees a choice between 2 flowers: one with, and one without a crab spider. In 24 of the 34 trials, the bees picked the flower that had the spider. In the other trials, the bees chose the spiderless flower. With these data, carry out the appropriate hypothesis test (one- or two-tailed), using the normal approximation to the binomial distribution to determine Z. For a one-tailed test, use the formula =(1-NORM.DIST(Z,0,1,TRUE) in Excel calculate P. For a two-tailed test, use the formula =2(1-NORM.DIST(Z,0,1,TRUE). State your answer for the value of P to three decimal places, and include the leading zero. Do all of the math in Excel DO NOT round the value of Z. Substitute the cell (e.g. B1) for Z in the formula for P.arrow_forwardIn a hypothetical plant, a serrated leaf margined (L) plant, when crossed with a smooth leaf (l)margined plant, produces offspring with wavy leaf margin. What is the probability that two wavy leaf-margined plant will have an offspring that is smooth margined?arrow_forward
- Flower color variation in Phlox drummondii living either in sympatry or allopatry with Phlox cuspidata has previously been studied. Phlox drummondii exist in four colors: light blue, dark blue, light red, and dark red. Each flower color is controlled by a specific combination of alleles. In allopatry, butterflies randomly pollinate Phlox drummondii flowers of all color types. In contrast, non-random pollination occurs between differently colored flowers when both Phlox species are living in sympatry. The graph depicts the relative fitness of the alleles that drive flower color in Phlox drummondii under conditions of sympatry or allopatry with Phlox cuspidata. Label each half of the graph with the term sympatry or allopatry based on the observed trend in the relative fitness of the alleles that control all four flower colors in Phlox drummondii.arrow_forwardY = yellow, y = green; R = round seed, r = wrinkled seed Dihybrid cross: If you mate YyRr x YyRr then what proportion of offspring will be green and wrinkled? 6/16 3/16 O 1/16 O 9/16arrow_forwardA heterozygous plant with genotype Aa self-pollinates. Find the probability that an offspring is tall for the following genetic systems. Half of heterozygous plants and one fourth of homozygous plants are tall (it depends on their position in the greenhouse)arrow_forward
- Consider the following hypothetical gene a plant. Gene T produces a protein that impacts stem length. There are two alleles for gene T, T which produces long stems and t which results in short stems. If gene T displays incomplete dominance, which of the following genotypes above would have a different phenotype? and What would the phenotype be for this genotype?arrow_forwardHow is flower color/pH an example of phenotypic palicityarrow_forwardMaize is a highly cross-pollinated crop and heterotic phenomenon is evident from the currently available hybrids. If you are given a huge random germplasm pool of maize, what procedure you will adopt to develop competitive high yielding hybrids.arrow_forward
- 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 colorarrow_forwardConsider the following case of blending inheritance. A population of plants starts out with an equal number of individuals of heights 40 and 60 cm. The parents mate randomly, and the height of an offspring is exactly equal to the average height of its parents. Find the probability of each of the possible matings of the offspring. Out of 100 plants, about how many would have height 50 cm?arrow_forwardIf round seeds is dominant to wrinkled seeds in peas, what type of seed will the offspring of a round seed plant and a wrinkled seed plant have? partly wrinkled partly wrinkled wrinkled wrinkled roundarrow_forward
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