Chromosome mapping and coefficient of coincidence
Not what you're looking for?
In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eyes) and hairless (no thoracic bristles). Phenotypically wild type F1 female progeny were mated to fully homozygous (mutant) males and the following progeny (1000 total) were observed.
PHENOTYPES NUMBER OBSERVED
spineless 321
wild 38
claret, spineless 130
claret 18
claret, hairless 309
hairless, claret, spineless 32
hairless 140
hairless, spineless 12
(a) What are the map distances between the three genes? Draw the map.
(b) What is the coefficient of coincidence?
Purchase this Solution
Solution Summary
Chromosome mapping can be done through F1 test cross results. In three point test sequence among genes as well as distance between genes in map units are calculated. Coefficient of coincidence tell us about double cross over.
Solution Preview
Please see the attached file.
In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eyes) and hairless (no thoracic bristles). Phenotypically wild type F1 female progeny were mated to fully homozygous (mutant) males and the following progeny (1000 total) were observed.
PHENOTYPES NUMBER OBSERVED
spineless 321
wild 38
claret, spineless 130
claret 18
claret, hairless 309
hairless, claret, spineless 32
hairless 140
hairless, spineless 12
(a) What are ...
Purchase this Solution
Free BrainMass Quizzes
How Well Do You Know Your Body?
This quiz will assess the different systems of the human body. It will examine everything from the organs to the cellular processes that occur.
The Heart
This quiz test the understanding of the heart and some of its parts. It is important to understand how the heart functions and what makes it function.
Labor Comfort Measures
Do you know how to comfort someone in labor?
Birth 101
Do you know about childbirth? Find out with this quiz.
Do You Know Your Macromolecules?
This quiz will assess your knowledge of the macromolecules that are important to living things.