When allele frequencies change due to individuals leaving or joining the population, which of the following has occurred?
a. Gene flow
b. Genetic drift
c. Natural selection
d. Mutation
a. Gene flow
When allele frequencies change due to individuals leaving or joining the population a gene flow has occurred.
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Which of the following statements correctly describes a quantitative trait?
A. People who are homozygous for the group of genes associated with skin pigment have either lighter or darker skin than those who are heterozygous for those genes. B. The alleles of the gene for red hair color is masked by the gene for brown hair color. C. A person heterozygous for dwarfism will always have the dwarf phenotype. D. A woman who has one allele for color blindness will not be color blind, but a man who has one allele for color blindness will be color blind. E. 25% of the offspring from a cross of two fruit flies that are heterozygous for curly wings will have curly wings.
Archaea are resistant to damage by harsh conditions because their membrane lipids, unlike those of bacteria and eukaryotes, have
A. ether linkages B. ester linkages C. fatty acid chains D. isoprene chains E. peptidoglycan
What type of plate boundary is likely to occur at a subduction zone?
a. Escarpment b. Convergent c. Divergent d. Transform
Parturition involves all of the following steps, EXCEPT
A. Dilation of the Cervix B. Dilation of the Uterine Fundus C. Delivery of the Fetus D. Delivery of the Placenta and Fetal Membranes E. Formation of Intrauterine Hematoma