Question

For fruit flies, smooth eye texture (ro+) is dominant to rough eye texture (ro), red eyes (ca+) are dominant to claret eyes (ca), and gray body color (e+) is dominant to ebony body color (e). The parental genotypes for a series of crosses are wild-type males mated to homozygous recessive females. The F1 generation is heterozygous for all 3 traits regardless of sex. Several F1 generation testcrosses are performed and produces the following offspring:

ro ca e341ro+ ca+ e+355ro ca+ e41ro+ ca e+37ro ca e+95ro+ ca+ e88ro ca+ e+9ro+ ca e6Total972
If the expected number of double crossovers is 19, what is the percent of interference in double crossover events to the nearest tenth (with one number after the decimal)? If the answer is 11.43 percent, report 11.4%.

Answer 1

The percent of interference in double crossover events can be calculated using the given formula.

Step-by-step explanation:

In this question, we are given the parental genotypes and the resulting offspring of fruit flies for three traits: eye texture, eye color, and body color. We are also given the total number of offspring and the expected number of double crossovers. The percent of interference in double crossover events can be calculated using the formula:

Percent of interference = (1 - (number of double crossovers / total offspring)) * 100

By substituting the values given in the question, we can calculate the percent of interference to be 1.953%. Rounding to the nearest tenth, the percent of interference is 2.0%.