4. Black body and vestigial wing in Drosophila are controlled by recessive alleles, b and vg, respectively. The dominant alleles, b* and vg*, produce wild-type flies with grey body and normal wing. A homozygous wild-type is crossed to a homozygous fly with black body and vestigial wing. The F1 progeny (all wild-type) is test-crossed. The F2 generation is as follows: 1930 wild type 1888 black, vestigial 412 black, normal 370 grey, vestigial

4. Black body and vestigial wing in Drosophila are controlled by recessive alleles, b and vg, respectively. The dominant alleles, b* and vg*, produce wild-type flies with grey body and normal wing. A homozygous wild-type is crossed to a homozygous fly with black body and vestigial wing. The F1 progeny (all wild-type) is test-crossed. The F2 generation is as follows: 1930 wild type 1888 black, vestigial 412 black, normal 370 grey, vestigial

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 5TYK

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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?
Topic: Penetrance. Petal number is controlled by a single gene in merigonias. The gene has a completely dominant wild type allele F that makes a plant have five petals and a mutant recessive six petal allele(f). However the six petal trait is only 50% penetrant. You do the cross Ff x Ff. What fraction of the progeny do you have the 6 petals? what is the meaning for 50% penetrant.
Drosohpila Punnet Square of Crosses. I need results of F1 & F2 generation using Punnett Squares for: Make Punnet Squares of the following crosses •Drosophila Female wildtype cross Male White-eye •Drosophila Male wildtype cross Female White-eye •Drosophila Female Wild Type cross Male Scarlet Eye •Drosophila Male Wild Type cross Female Scarlet Eye Also, Which allele is heterozygous and which is homozygous, & which is dominant and which is recessive?
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?
8-9. White eyes (w) is sex-linked and recessive in Drosophila. Cruved wings(cu) and black body (b) are autosomal recessive alleles on the same chromosome, separated by 20 map units. If one breeds a homozygous white, curved winged female fly to a homozygous black male fly to produce an F1, and inbreeds the F1 males and females, at what frequency is a phenotypically wild-type male expected? (note: male flies do not cross over) A. 0.25 es B.0.05 C.0.10 D. 0.20 E.0.125
Now cross two of the F₁ offspring. Parent 1 Gametes F2 Offspring Parent 2 Gametes 24. What is the phenotypic ratio in the F2 generation? 25. In the dihybrid cross you have considered two traits at a time. Although the number of traits has increased by one, what has happened to the number of possible phenotypes of offspring produced in the F2 generation? ni llit asa2013 bhidydenom sih at Simons 1:11 sabrax gatame
Problem Solving: In Drosophila, the gene that controls red eye color (dominant) versus white eye color is on the X chromosomes. What are the expected phenotypic results if a heterozygous female is crossed with a white-eyed male? In cats, S = short hair; s = long hair; XC = black coat; Xc = yellow coat; XCXc = tortoiseshell (calico) coat. If a long-haired yellow male is crossed with a tortoiseshell female homozygous for short hair, what are the expected phenotypic results?
14 In the garden pea, yellow pods (yp) are recessive to green pods (Yp) and straight tendrils (ct) is recessive to curled tendrils (CT). A plant with yellow pods and straight tendrils was crossed with a true breeding plant with green pods and curved tendrils. The F1 offspring were then test-crossed to plants with yellow pods and straight tendrils. The following offspring were observed: # offspring phenotype 327 yellow pod, straight 336 green pod, curled yellow pod, curled green pod, straight 17 19 Identify which is the nonrecombinant/parental phenotypes and which are the recombinant phenotypes Non-recombinant/parental Recombinant No Answers Chosen No Answers Chosen Possible answers | yellow pod and straight green pod and curled I yellow pod and curled I green pod and straight
the progeny i each seehario. Q4. You conducted an experiment similar to Morgan's fruit fly but you used honey bee instead. You are thus following 2 genes, the wing size Long (L) and short (1) and body color Yellow (Y) and black (y). You crossed YyLI x yyll and obtained 4,000 offspring. You counted the offspring classes and found the following distribution as follows: 1200 YyLl individuals 1190 yyll individuals 800 Yyll individuals 810 yyLl individuals a) what is the phenotype of each class of offspring? b) Which classes are of the parental type and which are the recombinant types? c) What is the recombination frequency between both genes? d) What is the map distance in cM and in map units between both genes? When you counted the offspring, you also collected data on a third gene coding for antenna shape. The gene has 2 alleles in the population, bended antenna (B) and straight antenna (b). You found a distance of 13 cM between the gene for antenna shape and that for wing size, and 24…
15-16. In the fruit fly, vestigial (tiny) wings and hairy body are produced by recessive genes. The normal alleles, long wings and hairless body, are dominant. If a vestigial- winged male heterozygous for hairless is crossed with a hairy female heterozygous for long wings, what will be the phenotypic ratio of the F1? F2Phenotypes = 1/4 normal wings/hairless 1/4 normal wings/hairy 1/4 vestigial wings/hairless 1/4 vestigial wings/hairy = 1:1:1:1 ratio F1 Phenotypes = 1/4 normal wings/hairless 1/4 normal wings/hairy 1/4 vestigial wings/hairless 1/4 vestigial wings/hairy = 1:1:1:1 ratio F1 Genotypes = 1/4 NnHh 1/4 Nnhh 1/4 nnHh 1/4 nnhh = 1:1:1:1 ratio F1 Phenotypes = All normal wings/hairy = 1:0 ratio
School - Dan. AClassroom What's Your Guardi. V Authentic Italian Re YouTube ver sheet ☆回 Add-ons Help Last edit was seconds ago BIUA Times New... - 14 1 .1 2 II| 4 5 Phenotype: % Go To Next Page 4. Cross a Green flower (YB) with another green flower. Y = yellow, B = Blue. Is this a codominant or an incomplete dominance problem? What is the probability of the offspring genotypes and phenotypes? (Use a Punnett Square and make a table as seen in the problems above to give genotypes and phenotypes) Genotype: edu gear lii lilı
O e. Parent 2: Parent 1: Parent 2: ¡Ai QUESTION 9 Bi QUESTION 8 Let's assume that, in dragons, red scales (B) are dominant to green scales (b), and long tongues (S) are dominant to short tongues (s). The genes that determine these characteristics assort independently. A homozygous red, long-tongued dragon is crossed with a homozygous green, short-tongued dragon. If an F1 dragon is crossed to a homozygous green and homozygous short-tongued dragon, what phenotypes and proportions are expected in the offspring? O a. 100% green and long-tongued O b. ½ green and short-tongued & ½ red and long-tongued O c. ½ red and short-tongued & ½ green and long-tongued O d.% red and long-tongued, % red and short-tongued, ½ green and long-tongued, % green and short-tongued O e. 9/16 red, long-tongued, 3/16 green, long-tongued, 3/16 red, short-tongued, 1/16 green, short-tongued Save and Submit to save and submit. Click Save All Answers to save all answers. 000 MacBook Air