Gene flow, defined as the movement of genes from one population to another, can take place by migration, as well as
A. physical movement of genes within an individual by transposons.
B. removing the barriers between the populations.
C. mating between individuals of adjacent populations.
D. mating with certain trait-containing individuals.
E. mating with dominant phenotypes.
C. mating between individuals of adjacent populations.
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Several genetic disorders, including Fanconi anemia and ataxia telangiectasia, are caused by mutations in ____
a. the cell wall b. mitochondrial DNA c. ribosome structure d. DNA repair genes e. DNA polymerase genes
Interferon directly interacts with and destroys viruses
Indicate whether this statement is true or false.
Which of the following happens right after the acrosomal reactions to prevent additional sperm from entering the egg?
a. The blastocyst is formed. b. The trophoblast is formed. c. The blastula is formed. d. Cleavage happens immediately.
If you or a loved one are confronted with possible cancer diagnosis, you may hear terms such as benign or cancerous in describing abnormal growth or structure of cells. A diagnosis of benign or precancerous polyps describes areas where you have raised clusters of cells lining the walls of your colon. The polyps can continue to grow abnormally, and may pose risk of developing into colorectal cancer. What is the key distinction of the polyps that an oncologist cancer physician would use to determine the point that the polyps are cancerous?
A. when the polyps begin to decrease in size B. when the cells are reproducing at abnormal rates, or in clusters of abnormal traits C. when damage occurs to the polyps, and there is visible bleeding from them when you go to the bathroom D. when the polyps begin interfering with your normal colon functions and cause discomfort E. when the abnormal polyp cells begin invading other tissues of your body