4:128. A heterozygous round seeded plant (Rr) is crossed with ahomozygous round seeded plant (RR). Give the expectedprobabilities for each genotype and phenotype.9. A homozygous round seeded plant is crossed with a homozygouswrinkled seeded plant. What are the genotypes of the parents?X10. In pea plants purple flowers are dominant white flowers. If twowhite flowered plants are crossed, what percentage of their offspringwill be white flowered?%PreviousWhat percentage of the offspring will also be homozygous?ZOOM +12. Two plants, both heterozygous for the gene that controls flowercolor are crossed. Give the expected RATIOS for each genotype andphenotype.Phenotype Ratio -Gentoype Ratio -11. A white flowered plant is crossed with a plant that is heterozygousfor the trait. What percentage of the offspring will have purpleflowers?13. In guinea pigs, the allele for short hair is dominant over long hair.Two short haired guinea pigs are mated several times. Out of 100offspring, 25 of them have long hair.What are the probable genotypes of the parents?wvm.instructure.com%(Show the cross to prove it!)

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Description: 4:128. A heterozygous round seeded plant (Rr) is crossed with ahomozygous round seeded plant (RR). Give the expectedprobabilities for each genotype and phenotype.9. A homozygous round seeded plant is crossed with a homozygouswrinkled seeded plant. W

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8. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). Give the expected probabilities for each genotype and phenotype. 9. A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What are the genotypes of the parents? What percentage of the offspring will also be homozygous? %

8. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). Give the expected probabilities for each genotype and phenotype. 9. A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What are the genotypes of the parents? What percentage of the offspring will also be homozygous? %

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter13: Genes, Chromosomes, And Human Genetics

Section: Chapter Questions

Problem 8TYK: Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene...

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In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene produces long wings; a recessive allele produces vestigial (short) wings. A female that is true- breeding for red eyes and long wings is mated with a male that has purple eyes and vestigial wings. F1 females are then crossed with purple-eyed, vestigial-winged males. From this second cross, a total of 600 offspring are obtained with the following combinations of traits: 252 with red eyes and long wings 276 with purple eyes and vestigial wings 42 with red eyes and vestigial wings 30 with purple eyes and long wings Are the genes linked, unlinked, or sex-linked? If they are linked, how many map units separate them on the chromosome?
The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list all of the possible F1 and F2 genotypes and phenotypes from a cross involving parents that are homozygous for each trait. Express genotypes with conventional genetic abbreviations.
In Section 12.3, ''Laws of Inheritance," an example of epistasis was given for the summer squash. Cross white WAvYy heterozygotes to prove the phenotypic ratio of 12 white:3 yellow:l green that was given in the text.
4:12 5. Set up the punnett square for each of the crosses listed below. The characteristic being studied is seed texture round seeds (dominant) and wrinkled seeds (recessive). Rr x rr Rr x Rr RR x Rr Tall: % Complete the punnett squares below using the given information. 6. A TT (tall) plant is crossed with a tt (short plant). Which trait is dominant? Give the expected probabilities for each genotype and phenotype. TT: Tt: Short: Previous % % tt: What percentage of the offspring would you expect be round? Wrinkled? ZOOM + What percentage of the offspring would you expect be round?_____ Wrinkled? What percentage of the offspring would you expect be round? Wrinkled? % 7. A hybrid tall (Tt) plant is crossed with a hybrid (Tt) plant. Give the expected probabilities for each genotype. phenotype. wvm.instructure.com
7-8. Assume that white color is dominant over yellow color in squash. If pollen from the anthers of a heterozygous white-fruited plant is placed on the pistil of a yellow- fruited plant, show using ratios the genotypes and phenotypes you would expect the seeds from this cross to produce. Genotypes = 1/2 Ww 1/2 Ww = 1:1 ratio | Phenotypes = All white = 1:0 ratio Genotypes = 1/2 WW 1/2 ww = 1:1 ratio | Phenotypes = 1/2 white 1/2 yellow = 1:1 ratio Genotypes = 3/4 Ww 1/4 ww = 1:1 ratio | Phenotypes = 3/4 white 1/4 yellow = 1:1 ratio Genotypes = 1/2 Ww 1/2 ww = 1:1 ratio | Phenotypes = 1/2 white 1/2 yellow = 1:1 ratio
1-Show the results of a dihybrid cross for the F1 and F2 generation between P generation of a pea plant that is homozygous dominant for purple flower and yellow pea seed with another pea plant that is homozygous recessive for white flower and green pea seed. Clearly show the cross indicating BOTH genotype and phenotype for each generation. How many offspring in the F2 generation will have these phenotypes? 2-What is the probability of a woman who is a carrier for the blood disease hemophilia producing a son with hemophilia if she marries a man who does not have hemophilia? What is the probability of her daughters having hemophilia? Explain why the probability of getting this disease is different for sons versus daughters in this case. Your work should clearly indicated sex, genotype and phenotype (carrier or affected).
11. Perform two consecutive crosses similar to those of Mendel for the following individual plants. Plants with round seeds (RR) are crossing with plants with wrinkled seeds (rr). After the first cross, cross the offspring together to generate F, offspring. What are the genotypic and phenotypic ration of F,? Round : wrinkled 3 1 phenotypic ratio: RR: Rr: rr Genotypic ratio: 1: 2: 1 12. Perform two consecutive crosses between these two plants, GGHH x gghh, as in question #11.
31 1. In guinea pig, fur color is determined by one gene, and fur length by another independently segregating gene. The black fur allele (B) is dominant to brown fur allele (b) and the short allele (S) is dominant to long fur allele (s). From progeny listed in the following table, provide the probable genotype for the parents of each cross. Phenotype of Progeny Black short black long brown short Bio3110 Genetics Additional problems (Chapter 2): Parents Black short X Black short Black short X Brown long Black long X Black long 90 17 0 32 16 35 29 14 0 brown long 8 15 2. A mouse with the genotype BbccEeFf is mated with another mouse with BBCcEEFF genotype. What is the probability of obtaining the following genotype in the progeny? a. BBCcEeFF b. BbccEEFf C. BbccEeFF 12 3. Determine the type of gametes that are formed from the following individuals with the given genotype? A. AaBbCc B. AABBCc C. AABbCc
Incomplete Dominance 1. In snapdragons, red flower color (R) is incompletely dominant over white flower color (r). The hybrids or heterozygous plants (Rr) are pink in color. a) Show the genotype for a white flower and for a red flower. b) If a red-flowered plant is crossed with a white-flowered plant, what are the genotypes and phenotypes of the F1 generation plants? Show your work. c) What genotypes and phenotypes will be produced in the F2 generation? Show your work? the the o doa A t r th s beirs ard the phenorypic and wo ran aials pring fro d) How did the genotypic and phenotypic ratio compare to each other in this incomplete dominance cross? gonarypi and e) What would the phenotypic ratio have been if this had been complete dominance?
+ ec +/Y + + w/Y y ec +/Y + ec +/y ec w ++ w/y ec w у ес +у ес и Determine the order in which the three loci y, ec, and w Occur on the chromosome and prepare a linkage map. 7.22 A cross involving X-linked genes was made between yellow, bar, vermilion female fies and wild males, and the F1 females were crossed with y B v males. The following phenotypes were obtained when 1000 progeny were exam- ined: Dra ord ma the 7.2 546 244 160 50 + + + + Bv y Bv y+ + y+v y B+ and an and and and +B + re + + v ge Determine the order in which the three loci occur on the chromosome and prepare a linkage map. 7.23 Female Drosophila heterozygous for ebony (e"le), scarlet (st*/st), and spineless (ss*/ss) were testcrossed, and the following progeny were obtained: PROGENCY PHENOTYPES NUMBER ir Wild type Ebony Ebony, scarlet Ebony, spineless Ebony, scarlet, spineless Scarlet 67 8. 68 347 78 368 Scarlet, spineless Spineless (a) Are these genes linked? Justify your answer. (b) Write the genes given on a…
2. 3 1. In radishes, flower color may be red, purple, or white. The edible portion of the radish may be long or oval. When only flower color is studied, no dominance is evident, and red x white crosses yield all purple. Determine the appropriate allele symbols and indicate which genotypes lead to which a. phenotypes. b. If the F1 purple plants described above are interbred, what will be the genotype and phenotype ratios in the F2 generation? C. Regarding radish shape, long is dominant to oval in the typical Mendelian fashion. What will be the phenotype ratios in the F2 generation of a cross between a true-breeding red, long radish and a white, oval radish?