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(2) In Drosophila there are three genes lozenge (z), singed (s), and crossveinless (c),...
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....
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute...
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute), ec (echinus), cv (crossveinless) and b (black) were crossed to phenotypically wild- type females, and the 3288 progeny listed were obtained. (Only mutant traits are noted.) 653 black, scute, echinus, crossveinless 670 scute, echinus, crossveinless 675 ild type 655 black 71 black, scute 73 scute 73 black, echinus, crossveinless 74 echinus, crossveinless 87 black, scute, echinus 84 scute, echinus 86 black, crossveinless 83 crossveinless 1 lack,...
Assume that three pairs of autosomal alleles are found in Drosophila: x and y and +,...
Assume that three pairs of autosomal alleles are found in Drosophila: x and y and +, and z and As shown by the symbols, each wild-type allele is recessive to its wild-type allele. A cross between females heterozygous at these thre recessive traits yields progeny having the following phenotypes: +650 xyz 661 xy+ 82 ++z 85 +y+ 255 x+z 262 e loci and males that exhibit all three +yz 3 X++ 2 What the distance from x to z? O...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on the Drosophila X chromosome (a, b, and c). Assume that you are starting out with true-breeding stocks that show all three recessive traits and true-breeding stocks that show all three dominant traits. A. If you wanted to do a 3-point test cross to map the three loci, how would you set up the cross? What genotypes do you use for males and females in...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart,...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
Drosophila females of wild-type appearance but heterozygous for three autosomal traits are mated to males that...
Drosophila females of wild-type appearance but heterozygous for three autosomal traits are mated to males that are homozygous recessive for the three traits. The three autosomal recessive traits are glassy eyes (g), coal-colored bodies (c), and striped thoraxes (t). The three dominant traits are red eyes (g+), gray bodies (c+) and solid thoraxes (t+) (remember, the wild-type allele has a + after it). You examine 1000 progeny of the above cross and they have the following phenotypic classes: 265 g+c+t+ 275 gct 120 g+ct...
31. ANALYSIS Priscilla Lane and Margaret Green studied the linkage relations of three genes affecting coat...
31. ANALYSIS Priscilla Lane and Margaret Green studied the linkage relations of three genes affecting coat color in mice: mahogany (mg), agouti (a), and ragged (Rg). They carried out a series of three-point crosses, mating mice that were heterozygous at all three loci with mice that were homozygous for the recessive alleles at these loci (P W. Lane and M. C. Green. 1960. Journal of Heredity 51:228-230). The following table lists the results of the testcrosses. Number Phenotype Rg 1...
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...
Can you please help me with this problem: 3. The allele b gives Drosophila flies a...
Can you please help me with this problem:
3. The allele b gives Drosophila flies a black body, and b+ gives brown, the wild type phenotype. The allele wx of a separate gene gives waxy wings, and wx+ gives nonwaxy, the wild type phenotype. The allele cn of a third gene gives cinnabar eyes, and cn+ gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 5 wild type;...
in the fruit fly Drosophila, a rubimentary Wong called 4. (2 points) In the fruit fly...
in the fruit fly Drosophila, a rubimentary Wong called
4. (2 points) In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independently assorting genes and are recessive to their dominant wild-type counterparts, full wings and gray body color. Wild-type males and females heterozygous for both traits are crossed, and 1800 progeny are are expected to be found with each possible phenotype? produced. How many progeny flies Full wing dominant Grol...
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....
Question 3. From text book Male Drosophila expressing the autosomal recessive mutations sc (scute), ec (echinus), cv (crossveinless) and b (black) were crossed to phenotypically wild- type females, and the 3288 progeny listed were obtained. (Only mutant traits are noted.) 653 black, scute, echinus, crossveinless 670 scute, echinus, crossveinless 675 ild type 655 black 71 black, scute 73 scute 73 black, echinus, crossveinless 74 echinus, crossveinless 87 black, scute, echinus 84 scute, echinus 86 black, crossveinless 83 crossveinless 1 lack,...
Assume that three pairs of autosomal alleles are found in Drosophila: x and y and +, and z and As shown by the symbols, each wild-type allele is recessive to its wild-type allele. A cross between females heterozygous at these thre recessive traits yields progeny having the following phenotypes: +650 xyz 661 xy+ 82 ++z 85 +y+ 255 x+z 262 e loci and males that exhibit all three +yz 3 X++ 2 What the distance from x to z? O...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on the Drosophila X chromosome (a, b, and c). Assume that you are starting out with true-breeding stocks that show all three recessive traits and true-breeding stocks that show all three dominant traits. A. If you wanted to do a 3-point test cross to map the three loci, how would you set up the cross? What genotypes do you use for males and females in...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
31. ANALYSIS Priscilla Lane and Margaret Green studied the linkage relations of three genes affecting coat color in mice: mahogany (mg), agouti (a), and ragged (Rg). They carried out a series of three-point crosses, mating mice that were heterozygous at all three loci with mice that were homozygous for the recessive alleles at these loci (P W. Lane and M. C. Green. 1960. Journal of Heredity 51:228-230). The following table lists the results of the testcrosses. Number Phenotype Rg 1...
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...
Can you please help me with this problem:
3. The allele b gives Drosophila flies a black body, and b+ gives brown, the wild type phenotype. The allele wx of a separate gene gives waxy wings, and wx+ gives nonwaxy, the wild type phenotype. The allele cn of a third gene gives cinnabar eyes, and cn+ gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 5 wild type;...
in the fruit fly Drosophila, a rubimentary Wong called
4. (2 points) In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independently assorting genes and are recessive to their dominant wild-type counterparts, full wings and gray body color. Wild-type males and females heterozygous for both traits are crossed, and 1800 progeny are are expected to be found with each possible phenotype? produced. How many progeny flies Full wing dominant Grol...
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