gene for which there are only two
alleles, p and q,
and p is completely dominant
over q. Which of the following
graphs best represents genetic drift in
this population?
- 1 In A Species Of Fish An Observable Trait Is Determined By A Gene For Which There Are Only Two Alleles P And Q And P 1 (46.6 KiB) Viewed 149 times
- 1 In A Species Of Fish An Observable Trait Is Determined By A Gene For Which There Are Only Two Alleles P And Q And P 2 (43.64 KiB) Viewed 149 times
terrestrial amphibian native to Central and South America. You know
that the habitat of the cane toad sometimes experiences periods of
intense heat with little precipitation. Which is
the best scientific justification of why
the cane toad is able to survive these hot, dry periods?
A> The toad enters a time of hibernation.
B. The toad responds to photoperiodism.
C> The toad undergoes a period of estivation.
D. The toad will migrate.
3. The graph below shows changes in the number of families of
organisms that existed during a time period in Earth's history.
Which of the following describes what would most
likely be happening between points Y and Z on the
graph?
- 1 In A Species Of Fish An Observable Trait Is Determined By A Gene For Which There Are Only Two Alleles P And Q And P 3 (10.99 KiB) Viewed 149 times
event.
B. A mass extinction is occurring as a result of changing
environmental conditions.
C. Genetic variation is increasing as a result of the fusion of
hybrid zones.
D. The total population of organisms is increasing as a result
of genetic drift.
1 0.8 0.6 0.4 0.2 pallele Allele Frequency - allele 2 4 6 8 Generation 1 0.8 0.6 Allele Frequency x 0.4 p allele allele 0.2 0 0 2 4 6 00 8 Generation
1 0.8 0.6 Allele Frequency 0.4 "pallele * allele 0.2 0 0 2 6 8 4 Generation 1 0.8 0.6 Allele Frequency 0.4 -p allele - allele 0.2 0 0 2 4 6 8 Generation
800 Z Number of families 500 0 Time (million years)