You are given two populations of true-breeding tomato plants with two simple dominant/recessive traits that sort independently. using the multiplication rule, how many different phenotypic combinations would you expect to see in the f2 generation? in what phenotypic ratio? a. two 3,1 b. three 9.6: 1 c. four, 9: 3: 3: 1

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

Which identifies the main purpose of biological taxonomy?