Although more than 50 genes contribute to the level of HDL (high-density lipoproteins), LDL (low-density lipoproteins), or triglycerides,
it has also been shown that a single gene within
this population of genes can affect two or three of these types of molecules. This single gene
with its multiple effects is said to show
____ .
Fill in the blank with the appropriate word.
pleiotropy
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Which of the following is an example of herd immunity?
A) Brucellosis is no longer found in farm animals in the United States. B) If 70% of the population is immunized against polio, the disease will be essentially absent from the population. C) Federal law requires that all cattle not immune to anthrax be destroyed. D) All farm animals used for food must be immunized against all the common agents of disease that infect humans.
In Thomas Hunt Morgan's experiments, the ratio of red-eyed flies to white-eyed flies appeared to follow a simple Mendelian pattern of inheritance. What observation(s) did he make that led to his conclusion that the white-eyed trait was actually not a simple Mendelian trait?
A. He was able to correlate the expression of white eyes to the inheritance of an X chromosome. B. He saw that only males had white eyes. C. He observed that the white-eyed trait was recessive. D. He was able to correlate the expression of white eyes to the inheritance of a Y chromosome because only F2 males had white eyes and the trait is recessive. E. He was able to correlate the expression of white eyes to the inheritance of an X chromosome because only F2 males had white eyes and the trait is recessive.
A whale belongs to the artiodactyls group of animals
Which of the following also belong to this group? a. pigs b. cows c. hippopotamuses d. deer e. all of these belong
Each codon consists of how many bases?
a. 3 b. 9 c. 16 d. 64 e. 128