The only known population of a reptile species lives on an African mountain. The population is relatively large, but no close relatives of this species are known. Suppose you could stop all mutations within the population and all emigration out of this
population. Which statement best describes the probable future of this population?
A) The population will decline and become extinct after a few generations because of excessive inbreeding.
B) Genetic drift will cause major evolutionary changes in the population.
C) Evolution will continue as natural selection acts on the genetic variability that exists in the population.
D) Although the population will cease to change, it may survive for as long as the environment remains constant.
Answer: C
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Pedigrees are useful to geneticists because they can help determine: Check all that apply.
_____ the mode of inheritance for a particular trait. _____ the genotype of a particular individual. _____ the probability that future offspring will inherit a particular trait. _____ whether a particular trait is dominant or recessive.
Why is mutation described as the only process that can increase genetic variation?
A. It is the only process that can produce new alleles. B. It is the only process that changes allele frequency. C. It is the only process that cannot be influenced by artificial selection. D. It is the only process that is not random. E. It is the only process that can produce deleterious results.
Sulfur is an integral part of which of the following molecules?
A. vitamins B. enzymes C. amino acids D. proteins E. Sulfur can be an integral component of any of these molecules.
A diploid organism that is heterozygous for a given gene has the same number of alleles (not type of alleles) as does an organism that is homozygous for that gene.
a. true b. false