Chapter 5, Problem 26P

Drosophila females heterozygous for each of three recessive autosomal mutations with independent phenotypic effects [thread antennae (th), hairy body (h), and scarlet eyes (st)] were testcrossed to males showing all three mutant phenotypes. The 1000 progeny of this testcross were

thread, hairy, scarlet	432
wild type	429
thread, hairy	37
thread, scarlet	35
hairy	34
scarlet	33

a.	Show the arrangement of alleles on the relevant chromosomes in the triply heterozygous females.
b.	Draw the Draw the best genetic map that explains these data.
c.	Calculate any relevant interference values.