Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. Often, it is impossible to determine which two alleles of a gene are present within an organism's chromosomes based solely on the outward appearance of that organism. However, an allele that is hidden, or not expressed by an organism, can still be passed on to that organism's offspring and expressed in a later generation.
Answer:
1) Populations are majorly increasing in areas where shifting cultivation is practiced, causing there to be less area available for use of shifting cultivation.
2) Around the world, overall, there is much less unoccupied land that is able to be used for shifting cultivation.
This is AP Human Geography, right?
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Slavery allowed the Americans to outnumber the Mexicans 3:1 and develop a new culture in Texas, and law passed outlawing slavery majorly factored in the desire for independence.
