Biology 106 Sample Questions Fall 1999 Dr. Dudash

TRUE or FALSE. Fill in the blank with the entire word. (2 points each)

_____Sexual selection explains why males often have conspicuous traits.

_____Viruses do not undergo a form of sexual recombination.

_____Agamospermy results from pollen fertilizing ovules AND results in seed set.

MULTIPLE CHOICE. Circle the answer that best fits the question.

The explanation for the origin of life that allows hypothesis testing:

A) extraterrestrial origin

B) divine origin

C) inanimate origin

D) none of the above

E) all of the above

In a population in Hardy-Weinberg equilibrium of a Pea the frequency of individuals with white flowers is 0.01. White flowered individuals are homozygous for the recessive allele (w). The frequency of the white allele (w) in the population is:

A) the square of 0.01

B) the square root of 0.01

C) 0.99

D) the square of 0.99

E) none of the above

Major components of sexual selection are:

A) intrasexual selection

B) intersexual selection

C) male-male competition

D) female choice

E) none of the above

F) all of the above

DEFINE and provide an EXAMPLE for each term

anisogamy=

directional selection=

vegetative reproduction=

chiasma=

SHORT ANSWER In the space provided, supply a concise answer to the following

1) Compare/Contrast the pros and cons of asexual versus sexual reproduction

2) In a large population of a randomly mating annual plant the frequency of individuals exhibiting homozygote recessive based albino flowers (ww) is 0.09 .

a) What is the genotypic frequency of the albino individuals in the population?

b) What is the phenotypic frequency of red flowered individuals in the population?

c) Calculate p and q:

d) Calculate the genotypic frequencies of the homozygote dominant and heterozygote red flowered individuals in the population.

e) Is this population in Hardy-Weinberg equilibrium?

MATCHING. Write the letter of the word or phrase in the bottom list that best fits or describes the phrase in the top list.

______ Similar selective pressures cause unrelated groups of organisms to evolve similar traits.

______ Also known as Geographic Speciation

_______ An anti-selectionist that led the attack on Darwin and Wallace's theory of natural selection.

Possible Answers: fission, convergent evolution, parallel evolution, adaptive radiation, Allopatric Speciation, Parapatric Speciation, Lamarck, Lyell, Jenkins.