Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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- In corn plants, a dominant allele (I) inhibits kernel colour, but the recessive allele (i) permits colour when homozygous. At a different locus, the dominant gene P causes purple kernel colour, and the homozygous recessive genotype pp causes red kernels. If plants that are heterozygous at both loci are crossed, what will be the phenotypic ratio of the F1 generation?arrow_forward9. A true-breeding blue-flower, wrinkled-seed, short-stem, yellow-leaf plant was crossed with a true-breeding red-flower, round- seed, long-stem, green-leaf plant and all of the progeny had the following phenotype: purple-flower, round seed, short-stem, approximately half of the leaves on the plants were yellow and the other half green. Assuming a single gene controls each trait, describe the inheritance pattern for each gene. Inheritance Pattern a. Gene Flower color Seed shape Stem length Leaf colorarrow_forward))((())&&&@@@arrow_forward
- 5. If flower color shows codominance, and R = red and r = white, what will the %3D %3D offspring of a cross between RR x rr look like? * 100% red 75% red, 25% white 100% red and white 100% pink 25% red, 50% red and white, 25% whitearrow_forwardA type of tomato (Solanum lycopersicum) produces fruit in three possible colors: red, green, and orange. You cross a true-breeding orange-fruited plant with a true-breeding green-fruited plant, and all the F1 offspring are red. You intercross the red F1s, and the resulting F2 generation consists of 108 red-, 40 orange-, and 44 green-fruited plants. 1) What type of epistasis is acting (dominant, recessive, duplicate dominant, or duplicate recessive)? 2) Assign the phenotypes to a modified 9:3:3:1 ratio. (Do not just calculate the actual ratio of the phenotypes.) Red : _____Orange : _____Green: _____arrow_forward2. A trait in garden peas involves the curling of leaves. A dihybrid cross was made involving a plant with yellow pods and curling leaves to a wild-type plant with green pods and normal leaves. All F1 offspring had green pods and normal leaves. The F1 plants were then crossed to plants with yellow pods and curling leaves. The following results were obtained: 117 green pods, normal leaves 115 yellow pods, curling leaves 78 green pods, curling leaves 80 yellow pods, normal leaves A. Conduct a chi square analysis to determine if these two genes are linked. B. If they are linked, calculate the map distance between the two genes. How accurate do you think this distance is?arrow_forward
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