3. In fruit flies, red eyes (R) are dominant over purple eyes (r). Two red-eyed fruit flies were crossed, producing the following offspring: 76 red-eyed flies 24 purple-eyed flies a. What is the approximate ratio of red-eyed to purple-eyed flies? - b. Based on your experience with previous problems, what two genotypes give rise to this ratio?. c. What are the parents' genotypes? d. What is the genotypic ratio of the F, offspring? e. What is the phenotypic ratio of the F, offspring?.

3. In fruit flies, red eyes (R) are dominant over purple eyes (r). Two red-eyed fruit flies were crossed, producing the following offspring: 76 red-eyed flies 24 purple-eyed flies a. What is the approximate ratio of red-eyed to purple-eyed flies? - b. Based on your experience with previous problems, what two genotypes give rise to this ratio?. c. What are the parents' genotypes? d. What is the genotypic ratio of the F, offspring? e. What is the phenotypic ratio of the F, offspring?.

Name: 3. In fruit flies, red eyes (R) are dominant over purple eyes (r). Tw
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: 3. In fruit flies, red eyes (R) are dominant over purple eyes (r). Two red-eyed fruit flies were crossed,producing the following offspring:76 red-eyed flies24 purple-eyed fliesa. What is the approximate ratio of red-eyed to purple-eyed flies? .b. Ba

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

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 6TYK

See similar textbooks

Similar questions

In peas, the allele Le produces tall plants and the allele le produces dwarf plants. The Le allele is dominant to le. If a tall plant is crossed with a dwarf, the offspring are distributed about equally between tall and dwarf plants. What are the genotypes of the parents?
The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green. 100 percent yellow-green seeds 100 percent yellow seeds 50 percent yellow, 50 percent green seeds 25 percent green, 75 percent yellow seeds
1. A woman who is heterozygous for the brown eye and blue eye alleles marries a man with blue eyes. What are the genotypes and phenotypes of the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
1. If a purebred pea plant with purple flowers was crossed with a purebred pea plant with white flowers, all of the offspring's flowers ended up being purple. In this instancethe WHITE flower trait is considered to be what?
1. A man with O blood type marries a woman with AB blood type. What are the expected genotypic and phenotypic ratios for the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
1. A gardener finds that some bean plants have pubescent leaves and others have glabrous leaves. a. Based on the results of the following crosses below, which trait is dominant, pubescent or glabrous? Which of the following crosses helped you determine the answer? b. Based on your answer in 1.a, determine the genotypes of the parents of each cross.
1. In a cross between a black and a white guinea pig, all members of the F1 generation are black. The F2 generation is made up of approximately 3/4 black and 1/4 white guinea pigs. (a) Diagram this cross, showing the genotypes and phenotypes. (b) What will the offspring be like if two F2 white guinea pigs are mated?
8. In guinea pigs, the allele for black fur (B) is dominant over the allele for white fur (b). Similarly, the allele for straight hair (H) is dominant over the allele for having rough hair (h). Pure breeding rough haired guinea pigs with black fur were crossed with pure breeding straight haired guinea pigs with white fur. a. State the genotype and the phenotype of the F1 individuals produced as a result of this cross.b. Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.c. Show the completed Punnett square below.
4. Marfan syndrome is a genetic trait caused by in a dominant allele. The trait causes a weakening of the aorta that can be fatal. A teenager whose mother has the syndrome (but whose maternal grandfather was not affected), and whose father was unaffected, is concerend that she may have the trait. a. What is the phenotype of each of her parents? Genotype? b. What is the chance that the teenager has Marfan syndrome?
2. In four-o’clocks, the allele for red flowers is incompletely dominant to the allele for white flowers, soheterozygotes have pink flowers. What ratios offlower colors would you expect among the offspringof the following crosses: (a) pink × pink, (b) white ×pink, (c) red × red, (d) red × pink, (e) white × white,and (f) red × white? If you specifically wanted to produce pink flowers, which of these crosses would bemost efficient?
4. An albino corn snake is crossed with a normal-coloredcorn snake. The offspring are all normal-colored.When these first-generation progeny snakes arecrossed among themselves, they produce 32 normalcolored snakes and 10 albino snakes.a. How do you know that only a single gene is responsible for the color differences between these snakes? b. Which of these phenotypes is controlled by thedominant allele?c. A normal-colored female snake is involved in atestcross. This cross produces 10 normal-coloredand 11 albino offspring. What are the genotypes ofthe parents and the offspring?