Question

A cross between a tomato plant that was excessively leafy (l) and resistant to leaf mold (C) and a tomato plant with normal leaves (L) that was susceptible to leaf mold (c) resulted in all phenotypically wild-type F1 tomato plants. A cross between these F1 tomato plants and a leafy plant that was susceptible to leaf mold produced 2000 offspring, with the following numbers of different phenotypes:________.
Number, Phenotype
177, leafy, susceptible to leaf mold
183, wild-type
815, leafy
825, susceptible to leaf mold
Compute the map distance between the leafy and susceptible to mold loci.
a. 9 map units
b. 41 map units
c. 18 map units
d. 36 map units
e. 82 map units

Answer 1

The answer to this is A.