A 3-point cross involves genes X, Y, and Z with dominant/recessive alleles X/x, Y/y, and Z/z....
A 3-point cross involves genes X, Y, and Z with dominant/recessive alleles X/x, Y/y, and Z/z. Suppose the (unordered) non-recombinants are X,y,z and x,Y,Z and the double-recombinants are X,Y,Z and x,y,z. What is the linkage order of these genes?
Homework Answers
Answer:
y X z / Y x Z -------------Linkage order
y x z / Y X Z ----------Double recombinant
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A 3-point cross involves genes X,
Y, and Z with dominant/recessive
alleles X/x,
Y/y, and
Z/z....
Genes W, Y, Z assort independently and are dominant over their corresponding alleles w, y, z....
Genes W, Y, Z assort independently and are dominant over their corresponding alleles w, y, z. You conduct an experiment where you set up a cross between two individuals heterozygous for each trait [Ww Yy Zz x Ww Yy Zz]. (a) What is the frequency of offspring resulting from the cross who are dominant homozygous--that is, whose genotype is [WW YY ZZ]?(b) What is the frequency of offspring whose phenotype is dominant for all three traits?
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...
A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the...
A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the recessive alleles are abc. She is crossed with an abc/Y male. The following progeny phenotypes are produced. These phenotypes are equally divided between male and female flies. Abc 420 aBC 435 abc 55 ABC 60 abC 14 ABc 16 What is the distance between a and c in mu?
2. You have an organism with 3 recessive genes that you are mapping, x, y, and...
2. You have an organism with 3 recessive genes that you are mapping, x, y, and z that are on the same chromosome. You cross a female heterozygous for all three traits in a test cross and obtain the following progeny. Progeny Number y + + 506 + + + 97 y + z 130 + XZ 513 ухг 83 y x + 16 I + x + 140 + + z 15 Total 1500 a. (13 points) What is...
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of...
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of both genes produce enzymes that function in the biochemical pathway shown to convert colorless precursors to a purple pigment. The recessive alleles do not produce enzyme. Therefore, at least one dominant allele of both gene A and gene B are required for purple flowers. Answer the questions about this biochemical pathway. ΑΑ, Αα BB, Bb Enzyme A Enzyme B Colorless precursor 1 Colorless precursor...
You are studying 3 genes X,Y and Z that are linked (and in that order; Y...
You are studying 3 genes X,Y and Z that are linked (and in that order; Y is in the middle). The distance between X and Y is 10 map units and the distance between Y and Z is 8 map units. If your test cross resulted in 1500 progeny and you observed 5 double crossovers would you conclude that interference has occurred? If yes, how much interference has occurred?
help please Questions 1. The dominate alleles are and 2. The recessive alleles are _and 3....
help please
Questions 1. The dominate alleles are and 2. The recessive alleles are _and 3. The kernels on car "A" represents a _ 4. What were the genotypes of the parents for ear "A"? For the genotypes use the Capital letter lower case letter standard abbreviations to represent the dominant and recessive alleles (refer to above). 3. The kernels on ear "B" represents a _cross. 4. What were the genotypes of the parents for ear"B"? - X For the...
3. Across is made between an Hfr strain of the genotype StrSx-y+z-and an F-strain of the genotype StrRx+y-z+. Interrupte...
3. Across is made between an Hfr strain of the genotype StrSx-y+z-and an F-strain of the genotype StrRx+y-z+. Interrupted-mating studies show that of the three markers y+ is transferred least frequently to the exconjugants, and that the Str locus never enters the recipient strain. Selection for the y+ recombinants was followed by replica plating for the x and z alleles. The following data were obtained: x+ y+ z+ 79 x+ y+ z- 13 x- y+ z+ 4 x- y+ z-...
What are alleles? Genes for different traits, such as hair color and eye color Alternative forms...
What are alleles? Genes for different traits, such as hair color and eye color Alternative forms of a gene for a single trait, such as blue eyes or brown eyes The locations of genes on a chromosome Recessive forms of a kind of characteristic carried by genes Dominant forms of a kind of characteristic carried by genes In order to have the additional information provided by the location of the centromere in chromosomes, the process of karyotyping uses a chemical...
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...
A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the recessive alleles are abc. She is crossed with an abc/Y male. The following progeny phenotypes are produced. These phenotypes are equally divided between male and female flies. Abc 420 aBC 435 abc 55 ABC 60 abC 14 ABc 16 What is the distance between a and c in mu?
2. You have an organism with 3 recessive genes that you are mapping, x, y, and z that are on the same chromosome. You cross a female heterozygous for all three traits in a test cross and obtain the following progeny. Progeny Number y + + 506 + + + 97 y + z 130 + XZ 513 ухг 83 y x + 16 I + x + 140 + + z 15 Total 1500 a. (13 points) What is...
In sweet peas, two genes (genes A and B) control flower color. The dominant alleles of both genes produce enzymes that function in the biochemical pathway shown to convert colorless precursors to a purple pigment. The recessive alleles do not produce enzyme. Therefore, at least one dominant allele of both gene A and gene B are required for purple flowers. Answer the questions about this biochemical pathway. ΑΑ, Αα BB, Bb Enzyme A Enzyme B Colorless precursor 1 Colorless precursor...
help please
Questions 1. The dominate alleles are and 2. The recessive alleles are _and 3. The kernels on car "A" represents a _ 4. What were the genotypes of the parents for ear "A"? For the genotypes use the Capital letter lower case letter standard abbreviations to represent the dominant and recessive alleles (refer to above). 3. The kernels on ear "B" represents a _cross. 4. What were the genotypes of the parents for ear"B"? - X For the...
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