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 b) if c = 0.3?
Homework Answers
Answer has been attached as image below.
In first image I have mentioned answer for both of condition followed by seprate attached images explanation for both of the conditions.
Hope this will help. Although I have double checked the calculations please check once again.
In case of interference the number of expected double crossovers is modified .3× 7 = 2.1% and the number of other expected phenotypes are modified accordingly.
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In Drosophila melanogaster, the recessive X-linked alleles white
(w), miniature (m) and forked (f) give the...
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by an autosomal recessive...
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by an autosomal recessive mutant allele that independently assorts with an autosomal recessive mutant allele for hairy (h) body. A parental cross was made between a fly that is homozygous for normal wings with a hairy body and a fly with vestigial wings that is homozygous for normal body hair. The wild-type F1 flies were crossed to each other and produced 1536 offspring. The phenotypes of the F2...
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by an autosomal recessive...
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by an autosomal recessive mutant allele that independently assorts with an autosomal recessive mutant allele for hairy (h) body. A parental cross was made between a fly that is homozygous for normal wings with a hairy body and a fly with vestigial wings that is homozygous for normal body hair. The wild-type F1 flies were crossed to each other and produced 1536 offspring. The phenotypes of the F2...
Obj. 37. In Drosophila forked (F) bristles is X-linked and dominant. If a virgin female homozygous...
Obj. 37. In Drosophila forked (F) bristles is X-linked and dominant. If a virgin female homozygous for forked s crossed with a wild-type male predict; the proportions/ratios of genotypes and phenotypes among the F1 and F2 as the sex and bristle trait. F: Females Phenotype F1 Males Phenotype Genotype Genotype F2 Females Phenotype = F2 Males Phenotype Genotype = Genotype =
Purple eyes (or), black body (b) and vestigial wings (vg) are recessive alleles in Drosophila melanogaster....
Purple eyes (or), black body (b) and vestigial wings (vg) are recessive alleles in Drosophila melanogaster. Apr prb bvg" vg trihybrid is crossed to a fly homozygous for the recessive allele at each locus. The following numbers of offspring are observed. Phenotype Number of progeny Unordered genotypes Ordered genotypes Wild type 92 188 1241 vg 7 pr, b 8 pr, vg 1243 b, vg 190 pr, b, vg Total: 2990 1. Write the full, unordered genotypes of each category Comit...
Purple eyes (pr), black body (b) and vestigial wings (vg) are recessive alleles in Drosophila melanogaster....
Purple eyes (pr), black body (b) and vestigial wings (vg) are recessive alleles in Drosophila melanogaster. Apr pr b' bvg' vg trihybrid is crossed to a fly homozygous for the recessive allele at each locus. The following numbers of offspring are observed. Phenotype Number of progeny Unordered genotypes Ordered genotypes Wild type 188 1241 vg pr, b pr, vg 1243 b, vg 190 88 pr, b, vg Total: 2990 1. Write the full, unordered genotypes of each category (omit the...
In Drosophila, purple eyes (pr) are recessive to wild type red eyes (pr+), and forked bristles...
In Drosophila, purple eyes (pr) are recessive to wild type red eyes (pr+), and forked bristles (f) are recessive to wild type bristles (f+). A pure breeding purple eyed, forked bristled fly was mated to a pure breeding red eyed, wild type bristled fly. The resulting F1s were crossed to true breeding purple eyed, forked bristled fly, and the following offspring were observed: 322 red eyed, wild type bristles 318 purple eyed, forked bristles 78 red eyes, forked bristles 82...
A female Drosophila melanogaster is crossed with a male. The male's phenotype and genotype are unknown,...
A female Drosophila melanogaster is crossed with a male. The male's phenotype and genotype are unknown, while female's phenotype is known to be red eyes, straight wings, shaved bristles, and an ebony body. So, then the female's genotype should be Xw+Xw ; c+ c; ee; sdsd. Given that red eyes are dominant to white eyes, straight wings are dominant to curved wings, long bristles are dominant to shaven bristles, and a gray body is dominant to an ebony, draw a...
In Drosophila, the autosomal recessive brown eye color mutation (b) displays interactions with both the X-linked...
In Drosophila, the autosomal recessive brown eye color mutation
(b) displays interactions with both the X-linked recessive
vermilion mutation (v) and the autosomal recessive scarlet (s)
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or homozygous for vermilion have white eyes. Flies simultaneously
homozygous for both the brown and scarlet mutations also have white
eyes. Flies that are wildtype at all 3 loci have wildtype eye
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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...
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut...
4. There are three genes on the X-chromosome in drosophila, yellow (y), white (w), and cut (ct). A yellow-bodied, white-eyed, and a homozygous normal winged female fly was crossed to a male with wild type body, wild type eyes, and cut wings. The Fi females were wild type for all three traits, while the Fi males had yellow bodies, white eyes, normal wings. The Fi females were crossed to yellow bodied, white eyed, cut wing males. The resulting F2 progeny...
Obj. 37. In Drosophila forked (F) bristles is X-linked and dominant. If a virgin female homozygous for forked s crossed with a wild-type male predict; the proportions/ratios of genotypes and phenotypes among the F1 and F2 as the sex and bristle trait. F: Females Phenotype F1 Males Phenotype Genotype Genotype F2 Females Phenotype = F2 Males Phenotype Genotype = Genotype =
Purple eyes (or), black body (b) and vestigial wings (vg) are recessive alleles in Drosophila melanogaster. Apr prb bvg" vg trihybrid is crossed to a fly homozygous for the recessive allele at each locus. The following numbers of offspring are observed. Phenotype Number of progeny Unordered genotypes Ordered genotypes Wild type 92 188 1241 vg 7 pr, b 8 pr, vg 1243 b, vg 190 pr, b, vg Total: 2990 1. Write the full, unordered genotypes of each category Comit...
Purple eyes (pr), black body (b) and vestigial wings (vg) are recessive alleles in Drosophila melanogaster. Apr pr b' bvg' vg trihybrid is crossed to a fly homozygous for the recessive allele at each locus. The following numbers of offspring are observed. Phenotype Number of progeny Unordered genotypes Ordered genotypes Wild type 188 1241 vg pr, b pr, vg 1243 b, vg 190 88 pr, b, vg Total: 2990 1. Write the full, unordered genotypes of each category (omit the...
In Drosophila, purple eyes (pr) are recessive to wild type red eyes (pr+), and forked bristles (f) are recessive to wild type bristles (f+). A pure breeding purple eyed, forked bristled fly was mated to a pure breeding red eyed, wild type bristled fly. The resulting F1s were crossed to true breeding purple eyed, forked bristled fly, and the following offspring were observed: 322 red eyed, wild type bristles 318 purple eyed, forked bristles 78 red eyes, forked bristles 82...
In Drosophila, the autosomal recessive brown eye color mutation
(b) displays interactions with both the X-linked recessive
vermilion mutation (v) and the autosomal recessive scarlet (s)
mutation. Flies homozygous for brown and simultaneously hemizygous
or homozygous for vermilion have white eyes. Flies simultaneously
homozygous for both the brown and scarlet mutations also have white
eyes. Flies that are wildtype at all 3 loci have wildtype eye
color. Flies that are homozygous or hemizygous for the recessive
mutant at only one...
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...
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