In codominance, heterozygote (Aa) has an intermediate phenotype between the dominant homozygote (AA) and recessive homozygote (aa).
In codominance, heterozygote (Aa) has an intermediate phenotype between the dominant homozygote (AA) and recessive homozygote (aa).
The physical expression of an organism's genes is known as A: genotype. B: heterozygote. C: phenotype. D: independent assortment.
The physical expression of an organism's genes is known as A: genotype. B: heterozygote. C: phenotype. D: independent assortment.
A heritable trait with two different forms (dominant and recessive) is known as A: an allele. B: a genotype. C: a phenotype. D: a gene.
A heritable trait with two different forms (dominant and recessive) is known as A: an allele. B: a genotype. C: a phenotype. D: a gene.
A unit of heredity with two or more different forms (usually dominant and recessive) is known as A: an allele. B: a genotype. C: a phenotype. D: a gene.
A unit of heredity with two or more different forms (usually dominant and recessive) is known as A: an allele. B: a genotype. C: a phenotype. D: a gene.
It is difficult to distinguish the physiological races in morphology, usually relying on ( ) to distinguish them. A: differential hosts B: phenotype C: genotype D: pathogenicity
It is difficult to distinguish the physiological races in morphology, usually relying on ( ) to distinguish them. A: differential hosts B: phenotype C: genotype D: pathogenicity
Which of the following is evidence of variation within a population? A: a mutation in a genotype produces a new phenotype of an individual B: a particular species becomes rare in its native habitat C: changes in climate interrupt the life cycle of a native plant D: a genetically modified plant is created in a lab
Which of the following is evidence of variation within a population? A: a mutation in a genotype produces a new phenotype of an individual B: a particular species becomes rare in its native habitat C: changes in climate interrupt the life cycle of a native plant D: a genetically modified plant is created in a lab
what is the characteristics of the germ-free mice ？ A: GF mice require 30% more calories than SPF mice B: GF mice require 30% less calories than SPF mice C: GF mice require almost the same calories than SPF mice D: No definite phenotype.
what is the characteristics of the germ-free mice ？ A: GF mice require 30% more calories than SPF mice B: GF mice require 30% less calories than SPF mice C: GF mice require almost the same calories than SPF mice D: No definite phenotype.
Which of the following statements about non-coding DNA is true ()? A: DNA sequences that do not encode proteins B: DNA sequences that do not encode RNA and proteins C: DNA sequence without function D: DNA sequence without phenotype after deletion<br/>[单选题][2分][难度3]
Which of the following statements about non-coding DNA is true ()? A: DNA sequences that do not encode proteins B: DNA sequences that do not encode RNA and proteins C: DNA sequence without function D: DNA sequence without phenotype after deletion<br/>[单选题][2分][难度3]
A gene knock-in (or knock-in) refers to a genetic engineering method that involves the one-for-one substitution of DNA sequence information in a genetic locus or the insertion of sequence information not found within the locus. A gene knock-in therefore can be seen as a gain of function mutation and a gene knockout a loss of function mutation, but a gene knock-in may also involve the substitution of a functional gene locus for a mutant phenotype that results in some loss of function.
A gene knock-in (or knock-in) refers to a genetic engineering method that involves the one-for-one substitution of DNA sequence information in a genetic locus or the insertion of sequence information not found within the locus. A gene knock-in therefore can be seen as a gain of function mutation and a gene knockout a loss of function mutation, but a gene knock-in may also involve the substitution of a functional gene locus for a mutant phenotype that results in some loss of function.