BMED 1302 CFUs

A certain duck has a blue beak and a mutation occurred to a flower (both a and c)

Which description is an example of a phenotype?

longer distance between divided groups

Which variable increases the likelihood of allopatric speciation taking place more quickly?

It does not share its habitat with related species

Which conditions is the basis for a species to be reproductively isolated from other members?

All of the above; Male lions compete for the right to mate with females with only one possible winner, the seeds of two plants land near each other and one grows larger than the other, two types of fish eat the same kind of food and one is better able to gather food than the other.

Which of the following situations will lead to natural selection?

Flood causes the formation of a new lake

Which situation would most likely lead to allopatric speciation?

All of the above; some bats and birds have wings that allow them to fly, squid and humans have eyes similar in structure, worms and snakes both move without legs

Which situation is most likely an example of convergent evolution?

natural selection

Which scientific concept did Charles Darwin and Alfred Wallace independently discover?

two species of insects produce infertile offspring

Which situation is not an example of a prezygotic barrier?

when members of closely related species reproduce

Which reproductive combination produces hybrids?

these are remnants of functional structures from a distant past common ancestor

Why do scientists consider vestigial structures evidence for evolution?

when individuals mate with those who are similar to themselves

What is assortative mating?

sexual dimorphism

When males and females of a population look or act differently, it is referred to as ____.

why individuals of one sex develop impressive ornamental traits

The good genes hypothesis is a theory that explains what?

how selective forces change the allele frequencies in a population over time

Population genetics is the study of:

inbreeding can bring together rare, deleterious mutations that lead to harmful phenotypes

When closely related individuals mate with each other, or inbreed, the offspring are often not as fit as the offspring of two unrelated individuals. Why?

founder effect and genetic drift, b and c

One of the original Amish colonies rose from a ship of colonists that came from Europe. The ship’s captain, who had polydactyly, a rare dominant trait, was one of the original colonists. Today, we see much higher frequency of polydactyly in the Amish population. This is an example of:

gene flow

When male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms?

mutation and gene flow

Which of the following evolutionary forces can introduce new genetic variation into a population?

Microevolution describes the evolution of organisms in populations, while macroevolution describes the evolution of species over long periods of time.

What is the difference between micro- and macroevolution?

a population undergoing natural selection

Which of the following populations is not in Hardy-Weinberg equilibrium?