What is the original source of genetic variation in a population? Which natural factors affect changes in this original variation?
What will be an ideal response?
Mutation is the original source. Chromosomal assortment and crossing over reshuffle combinations of mutations at different loci; forces such as selection, genetic drift, and migration can increase or decrease the frequencies of mutant alleles in populations.
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What is required for a group of clones to be considered a contig?
A. The clones need to have nonoverlapping regions of DNA. B. The clones should contain identical regions of DNA. C. The clones should contain different regions of DNA. D. The clones should have overlapping regions of DNA. E. The clones should have identical, nonoverlapping regions of DNA.
How is tropical deforestation linked to climate change?
A. Burning the forests releases carbon dioxide, and transpiration by trees is diminished. B. Burning the forests releases carbon dioxide, and transpiration by trees is increased. C. Burning the forests consumes oxygen, and transpiration by trees is diminished. D. Burning the forests consumes oxygen, and transpiration by trees is increased. E. None of the answer choices is correct.
In general, mutation rates in humans are ________
Fill in the blank(s) with correct word
The mechanism that "breaks" the linkage between linked genes is
A) pleiotropy. B) codominance. C) independent assortment. D) crossing over.