1.0- 0.8- Frequency of 0.6- allele Al 0.4- 0.2- 0 0 O(a) homozygous O(b) dominant (c) recessive 200 O(d) heterozygous (e
-
- Site Admin
- Posts: 899603
- Joined: Mon Aug 02, 2021 8:13 am
1.0- 0.8- Frequency of 0.6- allele Al 0.4- 0.2- 0 0 O(a) homozygous O(b) dominant (c) recessive 200 O(d) heterozygous (e
Some birds "mob" other predatory birds by attacking as a group. In one experiment, unrelated neighboring birds always assisted one another when a predator approached. The researcher then repeated the experiment but prevented one group of birds (group A) from assisting the other group (group B). They next released a predator near group A and observed that group B birds did not assist. Based on these results, what is the best explanation for cooperation in defense against predators? 4 O(a) Kin selection (b) Indirect benefits (c) Endosymbiosis (d) Reciprocity
With regards to heritability, which statement(s) is/are correct? O(a) a trait can have a genetic basis but still have no heritability O(b) heritability describes whether a trait is dominant or recessive (c) heritability describes the proportion of phenotypic variation in a population that results from genetic differences between individuals (d) a and c are correct (e) b and care correct
Male and female guppies in streams in Venezuela are sexually dimorphic, with brightly colored males and drab females. Nevertheless, there is variation in male coloration across populations, with males of some populations being much more brightly colored than others. A set of experiments was performed to understand why this natural variation exists. In the experiments guppy predators were either added or removed and male coloration was monitored over several generations. Over time, male guppies from high predation environments became less brightly colored, while males from low predation environments became more brightly colored. Please explain these results based on what you have learned in this course.