The progeny of a Drosphila female (heterozygous at three loci,y+y, ct+ct, w+w)
crossed to a wild-type male are listed as follows:
Females y+ ct+ w+ 2000
Males
y+ ct+ w 773
y ct w+ 782
y ct+ w+ 201
y+ ct w 209
y+ ct w+ 15
y ct+ w 16
y ctw 3
y+ ct+ w+ 1
a.) On which chromosome do these genes reside?
b.) What is the gene order and gene arrangement in the trihybridfemale parent?
The progeny of a Drosphila female (heterozygous at three loci,y+y, ct+ct, w+w)
crossed to a wild-type male are listed as follows:
Females y+ ct+ w+ 2000
Males
y+ ct+ w 773
y ct w+ 782
y ct+ w+ 201
y+ ct w 209
y+ ct w+ 15
y ct+ w 16
y ctw 3
y+ ct+ w+ 1
a.) On which chromosome do these genes reside?
b.) What is the gene order and gene arrangement in the trihybridfemale parent?
Related textbook solutions
Related questions
In Drosophila, the map positions of genes are given in map units numbering from one end of a chromosome to the other. The X chromosome of Drosophila is 66 m.u.. long. The X-linked gene for body color-with two alleles, y +for gray body and y for yellow body-resides at one end of the chromosome at map position 0.0. A nearby locus for eye color, with alleles w +for red eye and w for white eye, is located at map position 1.5. A third X-linked gene, controlling bristle form, with f + for normal bristles and f for forked bristles, is located at map position 56.7. Each gene resides on the Xchromosome, and at each locus the wild-type allele is dominant over the mutant allele.
Predict the frequency of gray with white eyes and forked bristles progeny type produced by this mating.
Enter your answer as a percentage to three decimal places (example 0.235 or 0.230).
Frequency=_________
2.
| Phenotype | Number |
| Pale | 648 |
| Pale, oval | 64 |
| Pale, short | 10 |
| Pale, oval, short | 102 |
| Oval | 6 |
| Oval, short | 618 |
| Short | 84 |
| Wild type | 98 |
| 1630 |
A wild-type trihybrid soybean plant is crossed to a pure-breeding soybean plant with the recessive phenotypes pale leaf l, oval seed (r), and short height (t). The results of the three-point test cross are shown in the table. Traits not listed are wild type.
Calculate the interference value for these data.
Enter your answer to three decimal places (example 0.201).
