A: Copy
B: Variation
C: Mutation
D: Deficiency
举一反三
- What is the Golden Rule to socialize with the Chinese? A: In China, do as the Chinese do. B: Fate brings people together no matter how far apart they may be. C: Know the enemy, know yourself, and in every battle you will be victorious. D: As a man sows, so shall he reap.
- What is the Golden Rule to socialize with the Chinese? A: In China, do as the Chinese do. B: Fate brings people together no matter how far apart they may be. C: Know the enemy, know yourself, and in every battle you will be victorious. D: As a man sows, so shall he reap.
- It serves you right. As a man sows, so does he ________.
- which of following do not belong to pathogenic variations of the endogenous genes ( ) A: gene amplification B: abnormal gene expression C: invasion of the foreign genes D: gene arrangement E: point mutation
- A________ trait is opposed to a recessive trait which is expressed only when two copies of the gene are present. A: determinant B: dormitory C: dominant D: dormant
内容
- 0
The proverb "Pride goes before a fall." is derived from ______. A: Christianity B: the Bible C: Greco-Roman Civilization D: geographic knowledge
- 1
If the trait transferred from the donor parent to the reincarnation parent is controlled by the recessive single gene, then the selection of the backcross progeny is required ( ) to separate the trait for easy selection.
- 2
Which<br/>of following can cause the great variation of influenza virus and<br/>wide epidemic: A: gene<br/>reassortment B: gene recombination C: transduction D: transformation E: conjunction
- 3
If a particular trait had a gene that had a possibility of 9 alleles in the population of a species, which of the following is true regarding this gene? A: The diploid number for the alleles would be 18 for this organism. B: The haploid number for the alleles would be 9 for htis organism. C: The maximum number of alleles for this gene would be 2. D: There is infinite variety in the expression of this trait in one organism.
- 4
Minor changes of HA are called A: Gene mutation B: Gene reassortment C: Antigenic shift D: Antigenic drift