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Concept explainers
The Basalt Seed Lending Library run by the Central Rocky Mountain Permaculture Institute and the Basalt (Colorado) Regional Library (see Experimental Insight
The many different types of seed produce plants and vegetables that consistently have specific traits. Give a genetic explanation for the consistent production of the same traits from plants grown from heirloom seeds.
A goal of the seed-lending program over time is to generate seeds and plants that thrive and yield better harvests. From an evolutionary perspective, explain how saving and replanting seeds from the most productive plants each year contributes to this goal.
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Chapter 2 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
- Please solve this problem using the test cross branch diagram without a punnet square.arrow_forwardAssuming you planted bean seeds that have been obtained from the same parent bean plant in three plots where growth conditions are the same except soil pH which varies as shown in the table attached which shows the effects of soil fertility on bean yields obtained from three plots where seeds from the same parent bean plant were obtained. a) is the trait, bean yield, qualitative (monogenic ) or quantitative (polygenic). Supoort tour answer with good reasoning.arrow_forwardCrossbreeding and genetic engineering are both ways to develop improved varieties of crops. True Falsearrow_forward
- Figure 19-16 shows the results of a QTL fine-mapping experiment. Which gene would be implicated as controlling fruit weight if the mean fruit weight for each linewas as follows?Line Fruit weight (g)1 181.42 169.33 170.74 171.25 171.46 182.27 180.68 180.79 181.810 169.3arrow_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_forwardA dairy farmer would like to reduce the incidence of mastitis within his herd. He has decided to implement genetic testing to inform management decisions within the herd towards this aim. Identify specific components of genetic evaluations that could be used to meet this objective. Discuss how the producer can influence annual genetic gain. How might the different factors you named in part a, affect annual genetic gain?arrow_forward
- Watermelon Genotypic and Phenotypic Ratio Practice Read the information below. Determine the ratios for phenotype and genotype of each Punnett Square.You may use the example from the Punnett Square worksheet as a guide.A genetic engineer is going to cross two watermelon plants to produce seeds for spring planting. He is breeding for size and wants to have many watermelons with the phenotype for long shape as possible. In watermelons, the allele for short shape is (S) is dominant to the allele for long shape. Determine the Genotypic ratios and phenotypic ratios for each Punnett square. Which cross would yield the highest number of long watermelons? Please make sure to write legibly to determine the capital “S” vs the lowercase “s” 1. SS x SS 2. SS x ss 3. SS x Ss 4. Ss x ss 5. Ss x ss 6. Ss x Ssarrow_forwardExamine the trait distribution of Specific Leaf Area (The ratio of leaf area to dry mass, SLA), below. The dotted normal distribution represents the natural pattern of SLA observed in nature. The histogram below the dotted curve represents the distribution of phenotypes when the plant is grown in a single common environment. The numbers above the bars represent the observed phenotype ratio. a a) How many polygenes encode for this trait? b) Assuming the minimum observed phenotype in a common garden was 8sqm/kg and the maximum observed phenotype was 20 sqm/kg, what is the contribution of each allele in this polygene?arrow_forwardWhen working on barley plants, two researchers independently identify a short-plant mutation and develop homozygous recessive lines of short plants. Careful measurements of the height of mutant short plants versus normal tall plants indicate that the two mutant lines have the same height. How would you determine if these two mutant lines carry mutation of the same gene or of different genes?arrow_forward
- https://www.researchgate.net/publication/235324145_Quantitative_Genetic_Application_in_the_Selection_Process_for_Livestock_Production Give a brief discussion about the study above mainly about genetics and variationarrow_forwardWhy plant breeders intend to change the inheritance of crop plants? How plant breeders can change the heredity of crop plants? Explain your answer in briefly.arrow_forwardConsider 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. Assume that gene T displays complete dominance, what would be the genotypes (written as two letters-your answer will be case sensitive) that correspond to- homozygous dominant, homozygous recessive and heterozygous. and the phenotypes (what trait will be observed in the plant) for each of the genotypes.arrow_forward
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