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4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut...
A cross in Drosophila involved the recessive, X-linked genes yellow (y), white (w), and cut (ch....
A cross in Drosophila involved the recessive, X-linked genes yellow (y), white (w), and cut (ch. A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut . The F, females were wild type for all three traits. • The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male offspring were tallied. On the basis of the data...
im not sure how to calcualte the double crossover offspring A cross in Drosophila involved the...
im not sure how to calcualte the double crossover
offspring
A cross in Drosophila involved the recessive, X-linked genes yollow (y), white (w), and cut (ch). A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut • The F, females were wild type for all three traits. The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male...
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type m...
please help with parts a-g
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type males and the F, females are test-crossed. The F2 males are distributed as follows: Phenotype Number 3210 72 1024 678 690 1044 60 3222 10,000 Give the genotype of the F1 females that gave rise to these progeny to show linkage phase? (2 points) A. 8. Which phenotypic classes are the parental types? (2 points) C....
37) The genes for mahogany eyes and ebony body are chromosome III in Drosophila. Assume that...
37) The genes for mahogany eyes and ebony body are chromosome III in Drosophila. Assume that a mahogany-eyed female was mated to an ebony-bodied male and that the resulting F1 phenotypically wild-type females were mated to mahogany, ebony males. Of 1000 offspring, 325 were mahogany, 375 were ebony, 125 were wild type, and 125 were both mahogany and ebony. What is the distance between the mahogany and ebony genes? A) 50 CM B) 15 CM C) 25 CM D) 75...
5. In Drosophila the genes white (w) black (b), speck (sp), and plexus (px) all map...
5. In Drosophila the genes white (w) black (b), speck (sp), and plexus (px) all map to different chromosomes. w/w or w/Y have white eyes (wild type eyes are red) X chromosome b/bflies have black bodies (wild type bodies are tan) 2nd chromsomome sp/sp flies have extra bristles on their body (wild type flies do not) 3rd chromosome px/px flies have extra veins on their wings (wild type flies do not) 4th chromosome You set up the following cross: P:...
In Drosophila, a cross between triply abnormal females with the X-linked recessive traits yellow bodies (y),...
In Drosophila, a cross between triply abnormal females with the X-linked recessive traits yellow bodies (y), echinus bristles (ec), and white eyes (w) and phenotypically normal males produces phenotypically normal F1 females. These F1 females are then testcrossed, and 1000 offspring occur as follows: Body Bristles Eyes number normal normal normal 447 yellow echinus white 442 yellow normal normal 18 normal echinus white 17 yellow normal white 28 normal echinus normal 33 normal normal white 8 yellow echinus normal 7...
In Drosophila melanogaster, the recessive X-linked alleles white (w), miniature (m) and forked (f) give the...
In Drosophila melanogaster, the recessive X-linked alleles white (w), miniature (m) and forked (f) give the phenotypes white eyes, miniature wings and forked brushes. The recombination between the w and m loci is 35%, and between the m and f loci, 20%. Wild-type males were crossed with females from a strain that was homozygous recessive for the three alleles, then the F1 flies were sibling mated. What phenotype frequencies are expected in F2 a) if there is no interference, and...
Questions 34 to 41 deal with linkage and mapping: see Sanders & Bowman 2015/2018 - Chapter...
Questions 34 to 41 deal with linkage and mapping: see Sanders & Bowman 2015/2018 - Chapter 5. 34. Two true-breeding Drosophila were crossed: a normal-winged, normal-bodied female and a curved-winged, speck-bodied male. The F, all have normal wings and normal bodies. Female F1 offspring were then crossed with curved-winged, speck- bodied male flies. The following offspring of that cross were counted: 174 normal wings, normal body (Neither the allele for curved wings nor 169 curved wings, speck body that for...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster....
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
In Drosophila, the autosomal recessive traits for dumpy wings (dp) and cinnabar eyes (cn) are found...
In Drosophila, the autosomal recessive traits for dumpy wings (dp) and cinnabar eyes (cn) are found on chromosome 2, separated by 44 map units. The allele for shaven bristles (sv) is found on chromosome 4 and is also recessive. A female with shaven. bristles is crossed to a male expressing dumpy wings and cinnabar eyes. FI females are test-crossed to males expressing all three traits. 3. What proportion of F2 flies (of either sex) will be completely wild type? a....
A cross in Drosophila involved the recessive, X-linked genes yellow (y), white (w), and cut (ch. A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut . The F, females were wild type for all three traits. • The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male offspring were tallied. On the basis of the data...
im not sure how to calcualte the double crossover
offspring
A cross in Drosophila involved the recessive, X-linked genes yollow (y), white (w), and cut (ch). A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut • The F, females were wild type for all three traits. The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male...
please help with parts a-g
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type males and the F, females are test-crossed. The F2 males are distributed as follows: Phenotype Number 3210 72 1024 678 690 1044 60 3222 10,000 Give the genotype of the F1 females that gave rise to these progeny to show linkage phase? (2 points) A. 8. Which phenotypic classes are the parental types? (2 points) C....
37) The genes for mahogany eyes and ebony body are chromosome III in Drosophila. Assume that a mahogany-eyed female was mated to an ebony-bodied male and that the resulting F1 phenotypically wild-type females were mated to mahogany, ebony males. Of 1000 offspring, 325 were mahogany, 375 were ebony, 125 were wild type, and 125 were both mahogany and ebony. What is the distance between the mahogany and ebony genes? A) 50 CM B) 15 CM C) 25 CM D) 75...
5. In Drosophila the genes white (w) black (b), speck (sp), and plexus (px) all map to different chromosomes. w/w or w/Y have white eyes (wild type eyes are red) X chromosome b/bflies have black bodies (wild type bodies are tan) 2nd chromsomome sp/sp flies have extra bristles on their body (wild type flies do not) 3rd chromosome px/px flies have extra veins on their wings (wild type flies do not) 4th chromosome You set up the following cross: P:...
Questions 34 to 41 deal with linkage and mapping: see Sanders & Bowman 2015/2018 - Chapter 5. 34. Two true-breeding Drosophila were crossed: a normal-winged, normal-bodied female and a curved-winged, speck-bodied male. The F, all have normal wings and normal bodies. Female F1 offspring were then crossed with curved-winged, speck- bodied male flies. The following offspring of that cross were counted: 174 normal wings, normal body (Neither the allele for curved wings nor 169 curved wings, speck body that for...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
In Drosophila, the autosomal recessive traits for dumpy wings (dp) and cinnabar eyes (cn) are found on chromosome 2, separated by 44 map units. The allele for shaven bristles (sv) is found on chromosome 4 and is also recessive. A female with shaven. bristles is crossed to a male expressing dumpy wings and cinnabar eyes. FI females are test-crossed to males expressing all three traits. 3. What proportion of F2 flies (of either sex) will be completely wild type? a....
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