bild 3 practice final wi07

8/14/2019 BILD 3 Practice Final WI07

1/16

BILD 3 Final ReviewBILD 3 Final Review


2/16


3/16

HW Review ContHW Review Cont

In the same population as the previousquestion, approximately what proportion

of the population carries a copy of the

recessive disease allele, but does not havethe disease. Choose the closest

approximation:Determine 2pq.q = 0.01 so p = 0.99

2pq= 2(0.01)(0.99) ~ 2(0.01)(1) = 0.02

2/100 = 1/50


4/16

6. Which of the following is not true with respect tomutation:

A. mutations are random with respect to adaptation.B. most mutations are slightly deleterious (or nearlyneutral).C. mutation is the ultimate source of variation.D. mutations have a larger effect in largerpopulations.E. synonymous mutations have no effect on aminoacid sequence.


5/16

12. If individuals from differing populations overcomeprezygotic reproductive barriers, additionalpostzygotic barriers may prevent the formation of stable

hybrids. Which of the following statementsregarding postzygotic reproductive barriers is false?A. Genetic differences may reduce survival andreproduction of hybrid offspring.B. If hybrids survive, they will ultimately form stablespecies.C. Hybrids may mature normally, but be infertile.D. Hybrid offspring may have reduced survival.E. Hybrid zygotes may fail to mature normally.


6/16

17. A scrub jay forgoes her own breeding to help anotherpair breed. To maximize her inclusive

fitness, should she choose to help her sister or hermother, and what term best describes this type of behavior?A. Mother, altruisticB. Sister, altruisticC. Doesn't matter, altruisticD. Mother, cooperativeE. Sister, cooperative


7/16

23. If young do not disperse far from their birth site,

the spatial distribution of individuals isexpected to be:A. evenly distributedB. clumpedC. unpredictableD. randomE. hyperdispersed


8/16

27. Which one of the following organisms bestexhibits a survivorship curve of high mortalityratesamong young individuals?A. elephantsB. humansC. birdsD. annual plantsE. whales


9/16


10/16


11/16


12/16

Is carrying capacity (k) a constant value? If

not, how can it change?

No, changes when habitat changes


13/16


14/16

4. Draw 3 graphs with rate on the y-axis anddensity on the x-axis.

a. Birth rate is density-independent but death rate isdensity dependent (high deathrate at high density)

b. Birth rate is density-dependent (high birth rate atlow density) and death rate isdensity-independent

c. Both birth and death rates are density dependent


15/16

AnswerAnswer

A B C


16/16

Describe how evolutionary forces may actagainst each other.

A. natural selection and sexual selection

B. migration and natural selection

Preference versus practicality

Intro new alleles disturbs nat selec

bild 3 practice final wi07

Documents