Exam 1 Questions

Question 1

Mendel’s law of segregation?

Answer 1

States that each gene is equally likely to be transmitted to gametes

Question 2

Factors that could lead to departure from Hardy -Weinberg equilibrium include?

Answer 2

Genetic drift

Question 3

Deviation from Hary -Weinberg equilibrium include?

Answer 3

A change in the allele frequency has occurred in the study population
and
The population is evolving

Question 4

Natural selection usually acts on?

Answer 4

Individuals

Question 5

Forms of natural selection include

Answer 5

Stabliizing xelection
Directional selection
Sexual selection

Question 6

What is true of sexual selection?

Answer 6

It usually involves male-male competition
It often involves female choice
An example would be large canines in male baboons
An example would be a male peacock’s tail feathers
(All of the above)

Question 7

After a drought, a scientist collects dead birds and finds that most who did not survive to adulthood have very small beaks. This is probably an example of?

Answer 7

Directional Selection

Question 8

In a mitosis

Answer 8

A diploid cell divides to form two diploid cells

Question 9

An allele

Answer 9

Is a form of gene
Contributes to an individual phenotype
Contributes to an individual genotype
Can be dominant or recessive
(All of the above)

Question 10

Gametes are

Answer 10

Sex Cells (sperm and eggs)

Question 11

Recombination and crossing-over are important in the genetic process because they produce

Answer 11

Variation

Question 12

Convergent evolution occurs

Answer 12

When natural selection produces similar adaptation in unrelated species

Question 13

Non-coding regions of DNA

Answer 13

Tend to accumulate mutations at a regular “clock-like” rate

Question 14

Genetic drift

Answer 14

Causes changes in gene frequencies that are random with respect to adaptation

Question 15

Allopatric speciation can occur when

Answer 15

Gene flow is interrupted between two subgroups of a mother population
A subpopulation is geographically separated from the mother population
(A and B only)

Question 16

Adaptive radiations are associated with

Answer 16

Speciation
Isolation from competition
Adaption to a variety of ecological niches
Colonization of new territories
(All of the above)

Question 17

Genetic evidence suggests that

Answer 17

Humans are more closely related to chimpanzees than to goriolas
Chimpanzees are more closely related to humans than to gorillas
(C and D only)

Question 18

Ancestral characters are traits that

Answer 18

Characterize the last common ancestor of a particular collection of species

Question 19

Derived character are traits that

Answer 19

Have evolved after the last common ancestor of a particular collection of species

Question 20

Haplorrhines differ from Strepsirrhines in that

Answer 20

They are found in South America

Question 21

Consider three species, A, B, and C who share a knuckle-walking common ancestor. Species A and B are bipedal. Species C is a knuckle-walker. Which of the following is most likely to be true?

Answer 21

A and B are more closely related to each other than to C

Question 22

Which of the following is characteristic of most primates?

Answer 22

Post-orbital bar

Question 23

Old World Monkeys differ from New World Monkeys in that

Answer 23

OWM are generally larger than NWM
OWM have fewer premolars than NWM
OWM occupy a wider range of habitats than NWM
(All of the above)

Question 24

Hominoids differ from most monkeys in that

Answer 24

They have many suspensory adaptations

Question 25

If variation in a trait is largely due to variation in genes, then

Answer 25

Identical twins should be more similar to each other than fraternal twins

Question 26

Total genetic variation within a human population contains about

Answer 26

85% of the genetic variation of the human species

Question 27

Which one of the following statements is FALSE?

Answer 27

Platyrrhines are distributed through Africa

Question 28

Which one of the following statements is TRUE?

Answer 28

The visual predation hypothesis suggests that the earliest primates were arboreal insectivores

Question 29

Gorilla

Answer 29

African hominoid

Question 30

Gibbon

Answer 30

small monogamous Asian ape

Question 31

Cercopithecine

Answer 31

fruit-eating Old World Monkey

Question 32

Tarsier

Answer 32

nocturnal insectivore

Question 33

Lemur

Answer 33

Strepsirrhine

Question 34

Homology

Answer 34

similar traits derived from the same species
Ex: Beaks on two different birds such as pigeons and doves

Question 35

Homoplasty

Answer 35

similar traits found in different species
Ex: Wings in birds vs. wings in butterflies

Question 36

Darwin’s Theory of Natural Selection (1)

Answer 36

1. Struggle for existence; intense competition

Question 37

Darwin’s Theory of Natural Selection (2)

Answer 37

Individuals within a population vary

Question 38

Darwin’s Theory of Natural Selection (3)

Answer 38

This variation can be inherited, passed from parent to offspring

Question 39

Darwin’s Theory of Natural Selection (4)

Answer 39

Due to the variation in traits, some individuals are better able to survive and reproduce than others (differential reproductive success) and are therefore naturally selected