The concept of gene flow indicates that evolution of populations can occur when individuals enter or leave a population. The addition of new alleles into the population makes it easy to visualize changes to phenotypes
Explain how emigration can lead to evolutionary change.
As individuals leave a population, the distribution of alleles in the original population changes. The effect is strongest on small populations as this can lead to a subtraction of specific genotypes, and hence, phenotypes from the population. If the traits leaving are inherited by a means in which the trait is dominant with only one allelic copy, then subtraction of those alleles in small populations has a rapid impact on the population's phenotype.
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Who was the first person acknowledged to have seen living, moving cells by using a microscope?
a. Robert Hooke b. Robert Brown c. Galileo Galilee d. Rudolf Virchow e. Anton van Leeuwenhoek
The failure of chromosomes to separate during mitosis or meiosis is called
a. genetic displacement. b. trisomy. c. crossing over. d. nondisjunction. e. disjunction.
Charles Darwin was the first person to discover the hormone auxin
Indicate whether the statement is true or false.
The use of lysozyme during the preparation of cheeses and wines is effective in reducing the numbers of
A. fungi. B. viruses. C. bacteria. D. prions. E. all microbes.