BSCS Biology: A Molecular Approach

Chapter 16: Population Genetics

Changes in Gene Pools

1.
The deformed red blood cell on the right is symptomatic of individuals who are homozygotes for the ____ allele.
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078664276/281029/ccq_ch16_q1.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (10.0K)</a>
A)malaria
B)alternative
C)sickle-cell
D)polymorphism
2.
What is the most likely reason that the English peppered moth changed color, as a species, between 1850 and 1900?
A)An environmental change forced it to adapt to survive.
B)New pigments became available because of technological advances.
C)The original moth population was eaten by rodents.
D)Chemicals in the air caused genetic mutations.
3.
Genetic drift is the random change in ____ frequencies.
A)mutation
B)allele
C)population
D)mating
4.
The gradual increase in homozygosity is called ____.
A)heterozygosity
B)homogenization
C)the founder effect
D)inbreeding
5.
What are "quantitative traits?"
A)Traits that are caused by more than one gene.
B)Traits that are usually of the either-or type.
C)Traits that can be measured.
D)Traits that are very widespread.
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.