Purebred lines of fruit flies with wild type (tan) body color and stubby bristles are mated to flies with ebony bodies and normal bristles. the resulting fl offspring all have a normal wild-type body color and stubby bristles. the fl flies are crossed with flies recessive for both traits (i. e. ebony bodies and normal bristles). what phenotypes and ratios of phenotypes would you expect to find among the offspring produced by crossing the fl with flies recessive for both traits? assume you found the following results among the offspring.
wild type body, stubby bristles 430
ebony body, stubby bristles 55
wild type body, normal bristles 65
ebony body, normal bristles 450
how could you explain these results?

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Scenario 5 1) take 10 red and 10 black beans and place them, mixed, on the table. record the starting phenotype # and frequencies (% of your total population) of your starting population in the table provided (generation 0). 2) act as a predator. “capture” as many organisms as you can until you have reduced the population to three organisms. put them aside. at this point, the predators die. 3) the remaining organisms each produce 2 clonal offspring. multiply your organisms accordingly and allow them to mix on the table. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 1). 4) repeat the reproduction event, allowing each of your organisms to produce 2 clonal offspring. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 2). 5) repeat the reproduction event, allowing each of your organisms to produce 2 clonal offspring. calculate and record the resultant phenotype # and frequencies (% of your total population) of your population in the table provided (generation 3).

Modern whales developed their traits through natural selection what occurs during the process of natural selection