Female drosophila heterozygous for the 3 X-linked genes sc, s, and v were crossed to males expressing all three mutant phenotypes. The following offspring were recovered.
sc s v 314 + s v 150 sc s + 10 sc + + 156 sc + v 46 + + + 280 + s + 30 + + v 14
What is the correct order of these genes?
a) sc s c
b) s v sc (correct answer)
c) v sc s
What is the closest map?
a) sc-----10-----s-----33-----v
b) s-----22-----v-----17-----sc
c) v-----21-----sc-----18-----s
d) sc-----15-----v-----28-----s
e) sc-----33-----v-----10-----s (correct answer)
Approximately what is the interference?
a) .73
b) .64
c) .27
d) .13
Female drosophila heterozygous for the 3 X-linked genes sc, s, and v were crossed to males expressing all three mutant phenotypes. The following offspring were recovered.
| sc | s | v | 314 |
| + | s | v | 150 |
| sc | s | + | 10 |
| sc | + | + | 156 |
| sc | + | v | 46 |
| + | + | + | 280 |
| + | s | + | 30 |
| + | + | v | 14 |
What is the correct order of these genes?
a) sc s c
b) s v sc (correct answer)
c) v sc s
What is the closest map?
a) sc-----10-----s-----33-----v
b) s-----22-----v-----17-----sc
c) v-----21-----sc-----18-----s
d) sc-----15-----v-----28-----s
e) sc-----33-----v-----10-----s (correct answer)
Approximately what is the interference?
a) .73
b) .64
c) .27
d) .13
Related textbook solutions
Related questions
In Drosophila, the gene for bar-shaped (B) eyes and the gene for scalloped wings (sc) are linked on the X-chromosome. (The normal or wild type eye shape is oval, and the wild type wing is rounded.) Heterozygous, bar-eyed females were mated to homozygous, scalloped-wing males. The offspring are as follows:
| phenotype | female | male |
| scallop | 183 | 186 |
| bar | 189 | 188 |
| wild type | 12 | 10 |
| scallop & bar | 9 | 12 |
-What is the map distance between the two genes?
-Give the exact phenotypes of the F1 flies.
