One true-breeding line of mice is obese and dark, and the other true-breeding line is lean and light. dark is dominant to light, but obese and lean exhibit incomplete dominance. the two genes involved are on separate chromosomes. what proportion of offspring from a dihybrid cross should be dark and obese?

Let us denote the color traits with 'D' for dark and 'd' for light. The dark color is dominant over the light color. The body weight traits, obese and lean are 'x' and 'y', respectively. Since the body weight traits show incomplete dominance over one another, they have been labelled separately. The mice with a pure line of dark-obese trait will have the 'DDoo' genotype. The mice with a pure line of light-lean trait will have the 'ddll' genotype. The resulting hybrid of the two types of mice is shown in image 1. The image 2 shows the cross between the hybrids of image 1. The proportion of offspring that will be dark and obese in the final cross between the hybrids will be, 3 (yellow) out of 16.

wild parsnip is a perennial plant which reproduces rapidly in areas which have no sign of agricultural activity such roadside or at no tillage open areas. it's considered invasive because it can inhibit the growth of another plant  and its reproduction is fast. there are several harmful effects of this invasive plant although its taproot is edible since it is a member of the carrot family. wild parsnips can cause skin blistering when in contact because of the chemicals it contains, second it inhibits the growth of other plants, it will restrict the growth of animals when eaten and lastly, it drives away natural pollinators like bees.