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2) Breed C averages 230 lbs, breed D averages 150 lbs, and the percent heterosis is 8%. Calculate the average
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- 1) Calculate the percent heterosis for a trait where breed A averages 100 lbs, breed B averages 150 lbs, and the F1 averages 140 lbs. Calculate the percent heterosis.3) Breed E averages 45 lbs, breed F averages 80 lbs, and the F1 averages 75 lbs. Calculate the amount of hybrid vigor.a. 1 dominant allele will contribute 120/10 = 12 cm to the base height of the plant.b. The height of the parent plant 1 Genotype of the parent plant 1 – D1D1D2D2D3D3d4d4d5d5 The height of the parent plant 2 Genotype of the parent plant 2 – d1d1d2d2d3d3D4D4D5D5Contributing alleles – D4D4D5D5. The height of the plant without any contributing alleles would be 80 cm. The plant with genotype d1d1d2d2d3d3D4D4D5D5 has 4 contributing allele each of which contributes 12 cm to the base. Hence, the height of the plant with genotype d1d1d2d2d3d3D4D4D5D5 would be 80 + 12 + 12 + 12 + 12 = 128 cm. c. Parents – D1D1D2D2D3D3d4d4d5d5 × d1d1d2d2d3d3D4D4D5D5 Gametes – D1D2D3d4d5 × d1d2d3D4D5 F1 generation – D1d1D2d2D3d3D4d4D5d5 The height of the plants of F1 generation = 80 + 12 + 12 + 12 + 12 + 12 = 140 cm Hence, Genotype of the F1 = D1d1D2d2D3d3D4d4D5d5 Phenotype of…
- 1. Consider this graph on running speed in huskies Midosspring running speed (m/s) 16 14 12 10 8 + 2 Husky running speed 4 6 8 Midparent running speed (m/s) 10 12 14 16 a. Approximately what is the heritability of running speed in this kennel of huskies? (You can approximate by eyeballing from the graph, no need to calculate the actual slope) b. If the breeder where to selectively breed the dogs, will the dogs run substantially faster in the next generation? c. What else can the breeder do to increase running speed?(b) A 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 com: varlety A varlety B varlety C long stalks short stalks long stalks high mass of grain low mass of grain low mass of grain (i) What would the plant breeder need to do to make sure he always produced corn with short stalks and a high mass of grain? Describe the three steps the breeder would use. (ii) Suggest one other characteristic that famers might like corn plants to have to increase the amount of corn produced.The following table shows Three-breed rotations (breeds A, B, and C). Complete the table.
- . In a dihybrid test cross, the following results were obtained: A‑B‑, 121; A‑bb, 107; aaB-, 115; and aabb, 93. Do these data approximate a dihybrid test cross ratio with independent assortment? Complete the following table and answer the related questions. Phenotype O E (O-E) (O-E)2 (O-E)2/E A_B_ 121 A_bb 107 aaB_ 115 aabb 93 Totals X2= Instructor’s Calculation of X2= 4.0367 In interpreting this X2 value, you have ____3_______degrees of freedom. In this case do you accept/reject the hypothesis that these data approximate a dihybrid test cross ratio with independent assortment? What is the probability that the deviations are due to chance alone?Give the genotype of the parents and determine the linkage map of the three genes bm (brown midrib), v (virescent seedling), and pr (purple aleurone) in maize from the results of the cross below. Genotypes of offspring Total and Frequency percentage V bm 230 467 pr + 237 42.1% + + bm 82 161 pr V 79 14.5% V 200 395 pr bm 195 35.6% pr bm 44 86 V + 42 7.8% +please show genotypic and phenotypic ratio 1.A male French Alpine (WwHH) is crossed with a female French Alpine (wwHh). Where W-White, w-gray, H-Horned, h-Polled. Give the phenotypic and genotypic ratio of their offspring.
- What do you mean by “Out – breeding”. What are the different methods employed for out breeding.C1C1 C1C2 C2C2 D1D1 D1D2 D2D2 Sand 0.07 0.39 0.54 0.25 0.5 0.25 Land 0.18 0.49 0.33 0.06 0.22 0.72 find the expected heterozygosity that is denoted by HT at the locus of C in total popuatlion.One example of a polygenic trait is the length of ears of corn. Suppose that the shortest ears of corn are about 6 cm, while the longest ears of corn are about 18 cm. The following table represents the F2 offspring of a test cross between a short-eared and a long-eared corn plant: Length of 5-7 cm 8-10 cm |11-13 14-16 |17-19 ears of corn cm cm cm Number of 20 F2 offspring 83 |126 85 21 What are the ratios of F2 offspring that express the extreme short or long-eared phenotype? Based on the ratios above, calculate the number of polygenes likely to be involved in ear length for corn.